1.Size:12" 14" 16" inch 2.Bike Frame: Magnesium aluminum alloy, One piece, no welding, more stronger. The weight is only 6kg 3.Bike Fork: Magnesium aluminum alloy, One piece, no welding. 4.Crank:one piece crank ,CP or ED or UCP; 5.Part to tighten the seat tube: very easy to assemble and tighten; 6.Brake: Tire brake. Easy to control and high sensitivity. 7.Handlebar and stem: 4-points handlebar,CP, argon-arc welding Φ22X0.8-1.5mm; 8.Tyre: Polyurethane tires,Anti-slip, shock absorption, explosion-proof. 9.Saddle: good leather, comfortably. 10.Rim: 12" 14" 16" steel alloy or aluminum or plastic; 11.Chain wheel & crank: 12"24T×89/1628T×102/20"28T×127 CP/ED 12.Flywheel: 16T/18T/20T Brown/Black/CP; 13.Mudguard: plastic.children bicycle kids bike children bike child bicycle kids bike baby cycle 14.Chain: full chain or 9-form chain cover;children bicycle kids bike children bike child bicycle kids bike baby cycle 15.Pedal: plastic, with reflector, without ball, PP/TPE/ALLOY; 16.Paint: painting;children bicycle kids bike children bike child bicycle kids bike baby cycle 17.Color: red, black, blue, green, yellow etc. any color you like; 18.Attachments:the covers of the wheels, training wheels,tool box.