Size:12"14"16"18"20" Mudguard:plastic,steel ,CP Chain:full chain or 9-form chain cover Saddle: good leather, common or spring /plastic/imitation leather/ plate PVC Pedal:plastic, with reflector, without ball, PP/TPE/ALLOY Paint:Painting Crank:one piece crank ,CP or ED or UCP; Part to tighten the seat tube:very easy to assemble and tighten; Brake:F/R Caliper Brake or R band brake or V brake or foot brake Color:red, black, blue, green, yellow etc. any color you like Attachments:flag, the covers of the wheels, training wheels,tool box, basket; Bike Frame:steel and painting, argon-arc welding or CO2 welding �¦22X0.8-1.5mm Bike Fork:steel and painting, co2 welding steel /suspension fork �¦22X0.8-1.5mm