Supply Air 4x4x3 Corrugated Cardboard Shipping Boxes – Brown Kraft Mailer Boxes for Packing, Moving & Storage (Multiple Pack Sizes)

Highlights

• CONSTRUCTION: Single-wall corrugated cardboard boxes with 32 ECT (Edge Crush Test) rating, consisting of brown kraft paper outer liner, fluted corrugated medium, and inner kraft liner. Each box withstands 32 pounds per linear inch of vertical compression before the corrugated structure fails
• DIMENSIONS: Interior measurements 4 inches length × 4 inches width × 3 inches height. Exterior dimensions approximately 4.2 × 4.2 × 3.2 inches accounting for wall thickness. Accommodates items measuring up to 4×4×3 inches
• WEIGHT: Each empty box weighs approximately 0.15 pounds. Total pack weight varies by quantity selected: 25-pack weighs 3.75 lbs, 50-pack weighs 7.5 lbs, 100-pack weighs 15 lbs, 200-pack weighs 30 lbs
• ASSEMBLY: Boxes ship flat (knocked down) to reduce storage space. Assembly process: unfold the flat blank, interlock the four bottom flaps to form the base without requiring tape or glue, load contents, fold down the four top flaps, and seal with packing tape
• MATERIAL: Brown kraft paper exterior with natural unbleached fiber. Corrugated medium layer consists of fluted paper forming air channels between the liners. No plastic coating or wax treatment applied to the cardboard surface

Description

Supply Air 4x4x3 Corrugated Shipping Boxes are constructed from single-wall corrugated cardboard with a 32 ECT (Edge Crush Test) rating. Each box measures 4 inches in length, 4 inches in width, and 3 inches in height (interior dimensions). The single-piece design folds flat for storage and assembles without tape or glue by interlocking the bottom flaps. The top flaps close and seal with standard packing tape (not included). Each box weighs approximately 0.15 pounds. The rectangular shape accommodates items measuring up to 4x4x3 inches. Available in multiple pack quantities: 25, 50, 100, and 200 boxes per pack. Boxes ship flat and require assembly before use. Manufactured in the United States. The corrugated construction consists of an outer kraft liner, a fluted medium layer, and an inner kraft liner bonded together. The 32 ECT rating indicates the boxes withstand 32 pounds per linear inch of stacking force before the corrugated board crushes.