This product is a pure copper hexagon socket standard bolt. Our store offers a wide range of medium and high-end bathroom products for household and hotel use, including stainless steel and pure copper faucets, shower screens, shower heads, floor drains, etc. Honest operation and factory direct sales. We sincerely welcome domestic and foreign merchants to come for negotiation and ordering. Contact person: Bao Shubing, contact number: 18657924888