Mountain Bike parts: 1.ISO9001 Certificate 2.European EN Certificate 3.Chinese famous brand Detailed Specs:5,6,7,8 speed non-index freewheelFinish: black, brown,cpStandard:FW-5,6:14T/28T FW-7,13T/28T,14T/28T FW-8,13T/30TOur products mainly include:bicycle,bicycle accesory,children bicycle,folding bicycle,moutain bicycle,city bicycle. and parts of bicycle and mountain bike such as:chain-wheel and ...