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Different Treatment ISO Standard Type B Double Sprockets Like

MOQ 5 Model: OD1000 Brief Description: 1. Material: Carbon Steel, Stainless Steel, Hardend & Tempered Steel, Cast Iron and so on2. Process: Forging, Cutting, Hobbing, lathe machining
Crank(P.S.): 1000 ; Crank: Other ; Material: Carbon Steel ; Use: BMX, Cruisers, Kids' Bikes, Mountain Bikes, Road Bicycles
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