pulley-auto parts, machine parts 1.Certificate: ISO/TS: 16949:2009 2.High quality; ... , taper bore, bore for QD bushing 4) Surface finish paint, phosphate, zinc plate 5) Material cast iron, ductile iron, nylon, aluminum ... steel, aluminum and stainless steel 4) Surface finish black oxidized phosphate, anodized, zinc-plated 5) Standard toothed bars are also available ...