ShelterLogic 12 x 20 x 8-Feet Peak Style Hay Storage Shelter, Green Cover Our 12' wide Storage Shelter is constructed using high grade steel. Every frame tube and connector goes through a proprietary 13 step Rhino Shield steel surface preparation process. 1-5/8" all steel frame, bonded with Dupont thermoset baked on powder-coated finish prevents chipping, peeling, rust and corrosion. Advanced engineered, 3-layer, chemically heat bonded, enhanced polyethylene, rip-stop fabric cover is standard issue. Hot air fused seams are 100% waterproof. UV-treated inside and out with added fade blockers, anti-aging and anti-fungal agents. High profile white interior lining provides enhanced illumination. Comes with slip fit connectors and swedged tubing for easy assembly. Heavy duty corner braces on corner ribs and rugged Ratchet Tite tensioning enables quick cover installation.