• Deep groove ball bearings model R188ZZ, double shielded for greater protection • Dimensions: inner diameter 5mm, outer diameter 13mm, thickness 4mm • Made of high carbon steel, providing durability and resistance to oxidation, corrosion, and deformation under heavy loads • Suitable for supporting radial and axial loads in both directions, making them ideal for applications that require strength and reliability • Used in industrial equipment, micromotors, small rotary motors, office equipment, skateboards, and skates • Easy to install and use in different applications • Pack of 5 units