Children Bicycle /Bike Size:from 12"to 20" Bike Frame:steel and painting Bike Fork:steel and painting ,Co2 welding steel /suspension fork Bike Rim:from 12”to 20”,steel Handlebar and stem: CP,argon-arc welding Brake:F/R caliper brake ,R band brake Mudguard: steel ,painting or CP Grips:PVC/RUBBER ROME B.B Parts: steel Chain:full chain or 9-form chaincover Color:black ,red ,blue,yellow and so forth Packaging: export standard packing