Container & Cargo Dry Strip Packs By Dry-Packs - 3.25LBS/1.5 KG - Product comes ready to use! Just open outer package and install (use). - Quantity needed to cover 20' container is 12 bags. For 40' container use 24 bags. Total can vary depending on length of storage, product type, etc. - Large 3.25LB Strip Pack with Adhesive Backing for sticking on side of walls. Ready to absorb moisture and protect your items! - Protect from "Container Rain" in cargo containers. Can also use in garages, boats, closets, basements, crawlspaces, etc. - Protect your valuables from moisture problems including Mildew, Mold, and Corrosion.