Features 1、Made of high quality bearing steel, wear resistant, anti-impact and durable. 2、The deep groove design provides more accurate pathway for the balls. 3、Double side metal sealed ball bearing, waterproof and dustproof. 4、The ball bearing can work stably under high speed. 5、Widely used for machine tool, electronic equipment, pump industry, motor and more. Specification Features: Made of high quality bearing steel, wear resistant, anti-impact and durable. The deep groove design provides more accurate pathway for the balls. Double side metal sealed ball bearing, waterproof and dustproof. The ball bearing can work stably under high speed. Widely used for machine tool, electronic equipment, pump industry, motor and more. Specification: Model: 6203-ZZ Material: Bearing steel Quantity: 10pcs Bore diameter: 17mm/0.67in Outer diameter: 40mm/1.57in Thickness: 12mm/0.47in Weight: 620g (approx.) Package List: 10 * Ball Bearings Package List