POM-6306 is a deep groove ball bearing made of polyoxymethylene (POM) engineering plastic. Dimensions: inner diameter 30mm, outer diameter 72mm, width 19mm. 6306 is a standard size series of deep groove ball bearings, primarily used in corrosive, humid, oil-free, and light-duty chemical conditions. Model POM6306 PP6306 PEEK6306 Brand ZH Material Plastic precision P0 P6 P5 P4 Product Description Product advantages: Corrosion resistant, waterproof and rustproof, self-lubricatin