Size:12"14"16"18"20"

Flywheel:16T/18T/20T Brown/Black/CP

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 

Φ22X0.8-1.5mm 

Bike Fork:steel and painting, co2 welding steel /suspension fork 

Φ22X0.8-1.5mm

Chain wheel & crank:12"24T×89/1628T×102/20"28T×127 CP/ED