Description: PA plastic (also called Nylon) is a material with good alkali resistance, which is suit for use in petroleum products and neutral chemicals. Bearing balls are used in applications such as drawer slides, precision bearings, pumps and valves, check valves, flow meters, and measurement instruments. Nylon bearing balls are specially useful for low load bearings, special valves, check valves, fluid level indicators, carburetors, flow meters, chemical, laboratory devices.Specification: Tolerance: +/-0.02mm Material: PA (Nylon, Polyamide)