bicycle 21 speed chain (408)
1.material:Q235
2.Tensile strength:920kg
3.Pin length:7.70mm

bicycle 21 speed chain (408) 

Our adjustable speed chain have four speed,27-speed,24-speed,21-speed,18-12 speed

1.material:Q235
2.Tensile strength:920kg
3.Pin length:7.70mm

4.Plate thickness:1.0mm

5.Pitch:12.7mm
6.professional supplier

7.Taiwan Technology in producing.

8.used for bicycle and electrocar and garage door

9.Packing:opp bag+inner box+carton+pallet