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We are the special manufactory in garden tool such as gasoline cylinder, we use the working procedure of hard chromium plating which company of TaiWan in China, electroplated coating is Greater than or equal to above HV900 , the exact straightness and out of roughness is about 0.005mm, the technical is the same of SHINDAWAZENORHSTIHLHONDAMITSUBISHIHUSQVAMA, we have high quality and convenient price, welcome to contact us. In the surface of the products, we use the working procedure of hard chromium plating which company from TaiWan, electroplated coating is Greater than or equal to above HV900 , the altitude advantage is as following: 1 chromium is not easy to drop 2 the useful time is longer 3 good function of head elimination the exact straightness and out of roughness is about 0.005mm............