A weld-in cage will ease fuel cell installation by offering a pre-made, safe and secure, robust cradle. The lower cage supports are made from 11 gauge STAINLESS STEEL. The upper cage is TIG welded by hand and made with 1" x 1" x 1/16" STAINLESS STEEL tube. And because the tubing is not mild carbon steel, they are rust resistant. Welding is required and should be performed by a professional. RA-Series fuel cells fit snug in the cage and are held in place with the included anodized aluminum straps. All parts are corrosion resistant.