precision piston/plunger piston/piston part 1 precision dimension 2 high quality 3 nice finish 4 good deliver precision piston/plunger piston/piston part1.Material: carbon steel, stainless steel, brass, Aluminium,etc. 2.Craft:Cutting, CNC, Grinding.3.Finish:Zinc, Nickel, carburizing, heat treatment, polish, etc.4.various size can be available.the parts can be manufacture according to your ...