valve seat inserts,bearing,cutter edge,etc.needle holders,valve seat inserts ... chemical composition, less impurity and smooth surface. The rod diameters range is from 2.5 to 8.0mm. ... 501.2012.503.001.003.00Bal1.00valve seat inserts,bearing,cutter edge,etc.Stellite 3542.4031.001.0012.503 ... 4.503.00Bal 0.103.50corrosion resistance pump,shaft,bearing sleevesTribaloy 700540.0815.503.40 1.5032.50Bal1.50 ...