SprocketMaterial40SiMnTiFinishSmoothColorsBlack or yellowTechniqueForging castingSurface HardnessHRC50-56,deepth:4mm-10mmWarranty time2000 hourCertificationISO9001-9002FOB PriceFOB Xiamen USD 200-1000/PieceMOQ2 pieceDelivery TimeWithin 30 days after contract established
