Track roller for after market part for Komatsu, Caterpillar, Hitachi, Kato, Dawoo, Hyundai, Sumitomo, Samgsung, Kobelco etc. 1. Product InformationMaterial50Mn/40SiMnTiFinishSmoothColorsBlack or yellowTechniqueForging castingSurface HardnessHRC50-56,deepth:4mm-10mmWarranty time2000 hourCertificationISO9001-9002FOB PriceFOB Xiamen USD 20-250/PieceMOQ2 pieceDelivery TimeWithin 30 days after ...