1-100pcs 45mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 20mm 25mm 30mm Metric POM Coin Ring Making Ball Plastic Bearing Ball Description: POM plastic (also called Polyformaldehyde) is a tough material with a low coefficient of friction and high abrasion resistance. Excellent wear-resisting and self-lubricating than any other engineering plastics, pom balls are suit to working between -40 to 130 for long time. Used in applications such as drawer slides, precision bearings, pumps and valves, check valves, flow meters, and measurement instruments that operate in aggressive environments. Specially useful for bicycles, casters, drawer slides, door locks and many other applications. Suitable for a range of purposes, some of the most common are listed below: 1/8" is often used for clusters and old English-style headsets 1/4" is often used for rear wheels and bottom brackets 3/16" is often used for front wheels 5/32" is often used for headsets with pressing cups Specification: Tolerance: +/-0.02mm Material: Polyoxy-Methylene (POM, Acetal, Polyacetal and Polyformaldehyde) 10mm 10pcs 10mm 20pcs 11mm 10pcs 12mm 10pcs 12mm 20pcs 8mm 10pcs 8mm 100pcs 8mm 50pcs 6mm 50pcs 6mm 100pcs 7mm 10pcs 7mm 20pcs 30mm 1pcs 30mm 2pcs 25mm 1pcs 25mm 10pcs 4.5mm 50pcs 4.5mm 100pcs 5mm 50pcs 5mm 100pcs 9mm 5pcs 9mm 50pcs 20mm 5pcs 20mm 10pcs 11mm 5pcs _x000D_