Model No:P5583
12 x 12 x 6" Heavy Duty Shipping Boxes, Kraft
Pack and confidently ship your items using our high-quality, heavy-duty single-wall boxes.
- Rock-Solid Construction: Manufactured from ECT-44 single wall kraft corrugated material, these boxes provide superior durability and strength. Perfect for shipping heavier contents that need extra support.
- Stronger Than Ever: These cartons are 40% stronger than standard shipping containers, offering enhanced protection for valuable items. Ideal for handling the bumps and jostles of shipping.
- Ultimate Versatility: Our heavy-duty single-wall boxes are perfect for a variety of items, including electronics, books, kitchenware, tools, and other heavy goods. They handle it all with ease and reliability.
- Stock Up with Ease: Sold in convenient bundle quantities, making stocking up in your warehouse or office a breeze. All boxes ship flat and are easy to assemble, saving you space and time.
- Efficient Packing: Save time and energy by using our heavy-duty boxes. Simply build, insert your items, and seal securely. Use appropriate void fill packaging to protect your items during transit.
Length (in.)Â :Â 12
Width (in.)Â :Â 12
Height (in.)Â :Â 6
Bundle Qty : 25
Strength : 44 ECT / 275 LB.
12 x 12 x 6" Heavy Duty Shipping Boxes, Kraft
P5583

Pack and confidently ship your items using our high-quality, heavy-duty single-wall boxes.
- Rock-Solid Construction: Manufactured from ECT-44 single wall kraft corrugated material, these boxes provide superior durability and strength. Perfect for shipping heavier contents that need extra support.
- Stronger Than Ever: These cartons are 40% stronger than standard shipping containers, offering enhanced protection for valuable items. Ideal for handling the bumps and jostles of shipping.
- Ultimate Versatility: Our heavy-duty single-wall boxes are perfect for a variety of items, including electronics, books, kitchenware, tools, and other heavy goods. They handle it all with ease and reliability.
- Stock Up with Ease: Sold in convenient bundle quantities, making stocking up in your warehouse or office a breeze. All boxes ship flat and are easy to assemble, saving you space and time.
- Efficient Packing: Save time and energy by using our heavy-duty boxes. Simply build, insert your items, and seal securely. Use appropriate void fill packaging to protect your items during transit.
- Product Info
- Specifications
- FAQs
- Options
- None
Weight:
- Unit Wt. (lbs.): .76
- Shipping Wt. (lbs.): 19
Features:
- Seams are glued.
- Boxes open along the length dimension.
Terminology:
- ECT refers to stacking strength.
- 44 ECT boxes withstand up to 44 lbs / inch of stacking strength before crushing.

Specifications:
- Meets ASTM D5118
FAQ for SupplyLand Heavy-Duty Single Wall Boxes
What are SupplyLand Heavy-Duty Single Wall Boxes?
SupplyLand created Heavy-Duty Single-Wall Boxes for strong protection and stacking. They are made from ECT-44 single-wall kraft corrugated material, perfect for shipping heavy items that need extra support.
What items can I ship using these heavy-duty boxes?
Our heavy-duty single-wall boxes are versatile and suitable for shipping a variety of items, including electronics, books, kitchenware, tools, and other heavy goods.
How strong are SupplyLand heavy-duty single wall boxes?
These heavy-duty boxes are 40% stronger than standard shipping boxes. They provide extra protection for your valuable items and are designed to withstand the bumps and jostles of shipping.
How are these boxes designed for easy packing?
Our heavy-duty single-wall boxes are great for efficient packing. They ship flat and are easy to assemble, saving space and time. Simply build the box, insert your items, and seal securely. Use appropriate void-fill packaging to protect your items during transit.
Are these boxes eco-friendly?
Our heavy-duty single-wall boxes are crafted from high-quality kraft corrugated material that is environmentally friendly and recyclable.
Can I buy these heavy-duty boxes in bulk?
Yes, our high-quality single-wall boxes are available in convenient bundle quantities. This makes it easy to stock up in your warehouse or office, ensuring you always have the right packaging on hand.
What are the benefits of using SupplyLand heavy-duty single-wall boxes?
- Durable Construction: Provides superior durability and strength.
- Enhanced Protection: 40% stronger than standard shipping containers.
- Versatile Use: Suitable for various heavy items.
- Efficient Packing: Easy to assemble and ship flat, saving space.
- Eco-Friendly: Made from recyclable kraft corrugated material.
What are the UPS guidelines for these boxes?
Our heavy-duty single wall boxes comply with UPS guidelines:
Single Wall Box Type | Weight Limit:
32 ECT: 30 lbs.
200 lb. test: 40 lbs.
Why should I choose SupplyLand heavy-duty single wall boxes?
SupplyLand heavy-duty single wall boxes offer superior protection, strength, and versatility. They are perfect to handle the demands of shipping heavy items while being easy to assemble and eco-friendly. These boxes ensure your items arrive safely and securely.
Where can I purchase SupplyLand heavy-duty single wall boxes?
You can purchase our heavy-duty single-wall boxes directly from the SupplyLand website. We offer a variety of sizes and bundle options to meet your specific shipping needs.
How do these boxes help with shipping efficiency?
Our heavy-duty single-wall boxes improve shipping efficiency. Their flat-pack design saves space in your warehouse and simplifies storage. When you need to use them, they are quick and easy to assemble, helping you save time and reduce labor costs. The robust construction ensures that even the heaviest items get protection during transit, reducing the risk of damage and returns.
Are there different sizes available?
Yes, SupplyLand offers a variety of sizes for our heavy-duty single-wall boxes. Whether you need small boxes for compact items or larger boxes for bulkier goods, we have the right size to meet your needs. Check our website for the full range of available sizes and choose the ones that best fit your shipping requirements.
Ship smart and ship secure with SupplyLand products ! Our selection of packing and shipping supplies includes everything you need to pack and ship products effectively. From boxes, tape, mailers, poly bags, and bubble wrap to labels, stretch film, and packing paper, SupplyLand has you covered.
Weight:
- Unit Wt. (lbs.): .76
- Shipping Wt. (lbs.): 19
Features:
- Seams are glued.
- Boxes open along the length dimension.
Terminology:
- ECT refers to stacking strength.
- 44 ECT boxes withstand up to 44 lbs / inch of stacking strength before crushing.

Specifications:
- Meets ASTM D5118
FAQ for SupplyLand Heavy-Duty Single Wall Boxes
What are SupplyLand Heavy-Duty Single Wall Boxes?
SupplyLand created Heavy-Duty Single-Wall Boxes for strong protection and stacking. They are made from ECT-44 single-wall kraft corrugated material, perfect for shipping heavy items that need extra support.
What items can I ship using these heavy-duty boxes?
Our heavy-duty single-wall boxes are versatile and suitable for shipping a variety of items, including electronics, books, kitchenware, tools, and other heavy goods.
How strong are SupplyLand heavy-duty single wall boxes?
These heavy-duty boxes are 40% stronger than standard shipping boxes. They provide extra protection for your valuable items and are designed to withstand the bumps and jostles of shipping.
How are these boxes designed for easy packing?
Our heavy-duty single-wall boxes are great for efficient packing. They ship flat and are easy to assemble, saving space and time. Simply build the box, insert your items, and seal securely. Use appropriate void-fill packaging to protect your items during transit.
Are these boxes eco-friendly?
Our heavy-duty single-wall boxes are crafted from high-quality kraft corrugated material that is environmentally friendly and recyclable.
Can I buy these heavy-duty boxes in bulk?
Yes, our high-quality single-wall boxes are available in convenient bundle quantities. This makes it easy to stock up in your warehouse or office, ensuring you always have the right packaging on hand.
What are the benefits of using SupplyLand heavy-duty single-wall boxes?
- Durable Construction: Provides superior durability and strength.
- Enhanced Protection: 40% stronger than standard shipping containers.
- Versatile Use: Suitable for various heavy items.
- Efficient Packing: Easy to assemble and ship flat, saving space.
- Eco-Friendly: Made from recyclable kraft corrugated material.
What are the UPS guidelines for these boxes?
Our heavy-duty single wall boxes comply with UPS guidelines:
Single Wall Box Type | Weight Limit:
32 ECT: 30 lbs.
200 lb. test: 40 lbs.
Why should I choose SupplyLand heavy-duty single wall boxes?
SupplyLand heavy-duty single wall boxes offer superior protection, strength, and versatility. They are perfect to handle the demands of shipping heavy items while being easy to assemble and eco-friendly. These boxes ensure your items arrive safely and securely.
Where can I purchase SupplyLand heavy-duty single wall boxes?
You can purchase our heavy-duty single-wall boxes directly from the SupplyLand website. We offer a variety of sizes and bundle options to meet your specific shipping needs.
How do these boxes help with shipping efficiency?
Our heavy-duty single-wall boxes improve shipping efficiency. Their flat-pack design saves space in your warehouse and simplifies storage. When you need to use them, they are quick and easy to assemble, helping you save time and reduce labor costs. The robust construction ensures that even the heaviest items get protection during transit, reducing the risk of damage and returns.
Are there different sizes available?
Yes, SupplyLand offers a variety of sizes for our heavy-duty single-wall boxes. Whether you need small boxes for compact items or larger boxes for bulkier goods, we have the right size to meet your needs. Check our website for the full range of available sizes and choose the ones that best fit your shipping requirements.
Ship smart and ship secure with SupplyLand products ! Our selection of packing and shipping supplies includes everything you need to pack and ship products effectively. From boxes, tape, mailers, poly bags, and bubble wrap to labels, stretch film, and packing paper, SupplyLand has you covered.

