High QualityThe bearings is made of high Carbon bearing steel for durability and resistance to rust, corrosion and deformity under heavy loads. SizeOuter Diametre:52mm, Bore(Inner Dia)25mm, Width(Thickness):15mm, Model6205-2RS, Material:High Carbon Chromium Bearing Steel(GCr15) FeatureRolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads,and it has small friction and high-limit speed Strictly ShieldedThe bearing has shield to keep lubricant in and contaminants out;protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan ApplicationRolling bearings are used in a range of applications from agricultural machinery to conveying equipment,robotics,dental equipment, elevators, rolling mills, ship rudder shafts, aggregate crushers,skateboards, inline skates, and scooters, among others