... is black, galvanization, chroming and colored drawing. 3, material is A3\C45, stainless steel and customer requirement. and with the processing ... , port etc..professional automation production and conveying transmission equipment MaterialC45, A3, 40Cr, 20CrMnTi, 42CrMo, copper, stainless steel and so on as ... plastic bag and outer carton box or customer requirement. kana machine chain wheel sprocket