Features 1、[THRUST BALL BEARING] Composed of bearing races, shaft rings and steel ball holder, which can be assembled and disassembled separately. 2、[BEAR AXIAL LOAD] Can bear axial load, suitable for machine parts that bear axial load on one side and lower speed. 3、[BEARING STEEL] Made of excellent bearing steel material, with high contact fatigue strength and wear resistance. 4、[WIDE APPLICATION] Can be used for crane hooks, vertical water pumps, vertical centrifuges, jacks, low speed reducers, etc. 5、[STANDARD SIZES] These thrust ball bearings have standard diameter and appropriate thickness, easy to install and less leakage. Specification Item Type: Thrust Ball Bearing Material: Bearing Steel Model Inner Diameter Outer Diameter Thickness 51100 10mm / 0.39in 24mm / 0.94in 9mm / 0.35in 51101 12mm / 0.47in 26mm / 1.02in 9mm / 0.35in 51102 15mm / 0.59in 28mm / 1.1in 9mm / 0.35in 51103 17mm / 0.67in 30mm / 1.18in 9mm / 0.35in 51104 20mm / 0.79in 35mm / 1.38in 10mm / 0.39in 51105 25mm / 0.98in 42mm / 1.65in 11mm / 0.43in Package List 10 x Shaft Rings 10 x Bearing Races 10 x Rolling Rings