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Bearings are used in a wide variety of industries and a broad range of applications in forms ranging from traditional ball and roller bearings to less traditional magnetic, jewel, air, and fluid bearings. They are available in loose form and also as ball transfers and other mounted bearings, as insert bearings located in bearing housings or user-supplied casements. Precision balls are available in a range of materials including stainless steel and other alloys, ceramic, and glass, with application requirements determining the choice of material. Industrial bearings are used in virtually every piece of machinery that is manufactured, as well as in the manufacturing process itself. They are used in the transmissions of every type of vehicle and in the drives of every type of appliance, as well as in motion control systems of automobiles and aircraft. A professional bearing, such as for use in toys such as yoyos and light-weight equipment, may be made of aluminum or plastic for light weight and corrosion-resistance. When choosing a bearing, consider the environment in which it is used and the axial and radial load requirements of the application. The rotation speed may be a determining factor in the choice of material, such as with the ceramic bearing and race used in a dental hand piece.