With rubber ring small sprockets One red large sprockets One blue large sprockets One yellow large sprockets One silver white with rubber ring Large sprockets One 525-120 knobside normal chain 525HO-12
material of the material:
20CrMnTi alloy steel
The specifications:
525-44T
Characteristics:
Muted tensile durable and long service life
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Items weight estimation 0 g, subject to actual weight
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