... 18" 20" available 3.high quality parts used China children bike Frame Material: Steel.Fork Material: Steel.Rim Material: Steel ... size12 14 16 18 20 inch2colorpink3 frame of kids bike steel and painting, thicker argon-arc welding4 fork ... and painting, CO2 welding steel5 rim of kids bike aluminum6 handlebar and stem ED , argon-arc ... cup18 Attachments traningwheels19 29 service OEM China children bike