9mm lifting chain means that its diameter is 9mm, the pitch is 3 times the diameter, and it is a standard 80-grade lifting chain.Made of high-quality manganese steel, the chain's tension was tested multiple times during the production process.Manufactured in accordance with national ISO3077, EN818, and AS2321 standards, it is truly a safe purchase and comfortable use.The products are underwritten by the People's Property Insurance Company of China, with guaranteed quality and more considerate service.We are looking forward to your arrival.