... .Item no:12'' 16' '20'' 2.Frame :steel ,painting , Children bike1.Item no:12'' 16' '20''2.Frame :steel ,painting ,top tubeΦ1 ... 756.Handlebar:CP.Φ22X1.0mm7Chainwheel&cranks:12''28Tx89 ,16''28Tx102,20''28Tx127,British system 8.Pedal:withoutball,plastic,with reflecter,British ... ,Packaging size:12'' 74x18x33cm 1x40HQ 1550sets, 16'' 85x18x42cm 1x40HQ 1000sets 20'' 105x18x51cm 1x40HQ 670sets children bicycle