Plastic ball main type: Polyurethane Plastic ball, Delrin Plastic ball, Nylon Plastic ball, Polypropylene Plastic ball, POM Plastic ball, PP Plastic ball, PA Plastic ball. Plastic ball precision achieved +/-0.02 to 0.001 mm, not gather the mold line, none the fragments, the surface is smooth, high-tech, the high quality, provides for the high precise customer selects. The Plastic ball uses in astronautics, the automobile, the medical service, the drugs manufacture, the satellite, the valve, pump, the bathroom, the electron, the electric appliance, and so on industry. Plastic ball size: 2.38mm; 2.5mm; 3.0mm; 3.175mm; 3.97mm; 4.0mm; 4.76mm; 5.0mm; 5.56mm; 6.35mm; 6.5mm; 7.14mm; 7.93mm; 9.52mm; 10.0mm; 10.32mm11.11mm; 12.7mm; 14.28mm; 15.87mm; 17.46mm; 19.05mm; 22.22mm; 25.4mm; 30.0mm; 35MM; 40.0mm; 50.0mm; 55mm; 60mm; 65mm; 70mm; 75mm; 80mm.