ProCoat coating corrosion resistant to harsh chemicals as well as UV rays and salt | Use with natural and LP (propane) gases | Approved for indoor and outdoor use | 24147 WASHER, COPPER^The item is used for Hardware, Fasteners & Hooks^This product manufactured in United States | 24147 WASHER, COPPER^The item is used for Hardware, Fasteners & Hooks^This product manufactured in United States