KOMAES Solar Panel Mounting Z Brackets with Nuts and Bolts-Set of 4 for RV, Boat, Roof, Wall and Other Off Gird Installation Lightweight; Easy to install. Mounts panels to RVs, trailers, boats or yachts. Material: Stainless steel, waterproof. Mounts panels to RVs, trailers, boats or yachts. Warranty: If any questions about Komaes products, feel free to contact us to solve your problem.