Description:-Single row, open-type, light weight plastic bearings.-This ball bearing has races made of Polyoxymethylenefor high rigidity and hardness. The bearing balls are made of glass and the cage is reinforced nylon (GRPA66-25).-Deep Groove Ball Bearings are one of the most widely used rolling bearings. They are used to accommodate radial and axial loads in both directions.-With small friction and high-limit speed, Ball Bearings are cost-effective and require little maintenance.-Polyoxymethylene Bearings are better in strength and wear resistance, suit for operating from -60 to 100 .-Suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on.-With good self-lubricating performance and low friction, plastic bearings are specially for high precision and high speed operation. Specification:Model: 6205Shielded Type: Open-TypeInner Race/Outer Race Material: PolyoxymethyleneBall Material: GlassCage Material: Nylon (GRPA66-25)Inner Diameter (d): 25mmOuter Diameter (D): 52mmThickness (B): 15mmNoise Level: Z1Number of Pack: 2Pcs