Specification:12'14'16'18'20'etc
1.frame:steel, tube thinkness: 0.7mm, 0.8mm,0.9mm,1.0mm,1.2mm   tube diameter:for this model 38mm surface treatment:painting
2.saddle: peach form, PVC cover,with rest back
3.pedal: without ball, with reflecter,
4. full chain cover, safe for your kids when riding
5. EVA tire: light weight
6. addition: basket,carrier, bell, mirror, training wheel