all kinds of bicycle freewheel, be used on 12" to 28", brand,size, 1 speed or 6 speeds is based on order, we have more than 100 types of pedais,chainwheels&crank,chain covers,cycle holders,front and rear axles,back seatsand bicycle baskets...etc.,if you want our products,please send me an e-mail or contact me though the trade manager,then I could send you our catalogue. bicycle parts