18 x 18 x 18" V3c Weather-Resistant Corrugated Boxes

These 18 x 18 x 18 inch corrugated boxes are built to V3c specification using 350# single wall corrugated board with water-resistant adhesive (WRA). The WRA construction resists moisture degradation during transit and storage, making these boxes dependable in humid environments, refrigerated warehouses, and conditions where condensation is a recurring factor. They meet military packaging specifications for structural performance, reflecting a higher standard of integrity than standard commercial-grade corrugated.

The cubic 18-inch interior footprint suits medium to large components, industrial parts, equipment assemblies, and packaged consumer goods. These boxes are frequently used in e-commerce fulfillment, manufacturing distribution, government and defense supply chains, and export shipping where moisture exposure and structural demands exceed what standard corrugated can reliably handle.

Each box weighs approximately 3.99 lbs and is parcel-friendly. Boxes are sold in bundles of 10; order multiple bundles to meet high-volume production or fulfillment requirements. Meets ASTM D5118.