Supply Air 5x4x4 Corrugated Shipping Boxes – Cardboard Mailer Boxes for Packing, Moving & Storage (Multiple Pack Sizes)

Highlights

• 5x4x4 INCH CORRUGATED BOXES: Each box measures 5 inches long, 4 inches wide, and 4 inches tall when assembled. Single-wall corrugated cardboard construction consists of kraft linerboard laminated to a fluted medium in a three-layer structure. The 32 ECT (Edge Crush Test) rating indicates the corrugated edge withstands 32 pounds per linear inch of stacking compression before crushing. Available in multiple pack quantities ranging from 25 to 200 boxes per order
• MATERIAL CONSTRUCTION: Constructed from uncoated brown kraft linerboard with internal fluted corrugation. The single-wall design creates a three-layer composite: outer linerboard, fluted medium, and inner linerboard. Corrugation runs parallel to the 4-inch dimension. Each assembled box weighs approximately 0.3 pounds
• INTERIOR CAPACITY: Interior dimensions of 5 x 4 x 4 inches accommodate items measuring up to 4.9 x 3.9 x 3.9 inches to allow clearance for cushioning materials. The corrugated walls add approximately 0.125 inches thickness per side. Total interior volume is 80 cubic inches per box
• ASSEMBLY AND CLOSURE: Boxes ship flat in knocked-down form, reducing storage volume by approximately 85 percent compared to assembled state. Assembly requires folding along pre-scored crease lines to form the box shape. Closure is achieved by folding four interlocking top and bottom flaps and sealing with external tape (tape sold separately)
• QUANTITY OPTIONS: This variation family includes pack sizes of 25, 50, 100, and 200 boxes. Each pack contains the specified number of flat corrugated boxes. Select the pack quantity that matches your volume requirements from the available options on this listing

Description

Supply Air 5x4x4 Corrugated Shipping Boxes are constructed from single-wall corrugated cardboard with a 32 ECT (Edge Crush Test) rating. Each box measures 5 inches in length, 4 inches in width, and 4 inches in height when assembled. The material consists of kraft linerboard laminated to a fluted medium, creating a three-layer structure. The boxes ship flat and assemble by folding along scored lines and closing the flaps. The exterior surface is uncoated brown kraft paper. Each unit weighs approximately 0.3 pounds. Closure is achieved by folding four interlocking flaps and sealing with tape (tape not included). The 5x4x4 interior dimensions accommodate items measuring up to 4.9 x 3.9 x 3.9 inches to allow clearance. This listing is available in multiple pack quantities: 25, 50, 100, or 200 boxes per order. Boxes are manufactured in the United States. The single-wall corrugation consists of one layer of fluted paper between two flat linerboard sheets. The 32 ECT rating indicates the boxes withstand 32 pounds per linear inch of stacking force before the corrugated edge crushes. Assembly requires no tools or adhesive beyond external sealing tape. Each box is delivered in knocked-down flat form to minimize storage volume.