1)MaterialSemi-metal2)Friction coefficientBetween 0.35and 0.453)NoiseNone4)Using lifeOver 30000 KM5)PcakingInner packing—shrink wrapped and paper box;4pcs/set/box,20sets/ctn,Outer packing-paper carton and wooden pallets.6)CertificationTS69497)OEMavailable8)The best quality and competitive factory price
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