... products: crank,pedal,saddle,tube,cotter pin,hub,freewheel,chain,steel ball,fork,front and rear derailleur,grip,handle bar,mudguards ... and ED2.Teeth crank and weight is to order3.Material: Steel,Aluminum Alloy and Carbon4.All are tested by china CIQ ... by quality control department before leaving factory high painted and heavy duty chainwheel crank