A POM 6004 bearing is a lightweight, metric deep-groove plastic ball bearing featuring an inner diameter of 20 mm, outer diameter of 42 mm, and a width of 12 mm. Built with polyoxymethylene (POM) rings and typically glass or stainless steel balls, it offers anti-rust and self-lubricating properties. Model POM6004 PP6004 PEEK6004 Brand ZH Material Chrome Steel precision P0 P6 P5 P4 Product Description The POM 6004 bearing is a deep groove ball bearing made of polyoxymethylene