Item Type: Self-aligning ball bearing Model: 3306-2RS Material: Bearing steel Inner Hole Diameter: Approx. 30mm / 1.2in Thickness: Approx. 30.1mm / 1.2in Diameter: Approx. 72mm / 2.8in Package List 3 x Self-Aligning Ball Bearing 1This self-aligning ball bearing supports wide application in bicycle industry, paper making machinery, vehicle axles, woodworking machinery and others. 2Complete model can meet your needs and such ball bearings are used for special car, which keeps clear lettering, flat and smooth. 3Low noise self-aligning ball bearing can runs fast to reduce impact on the equipment. 4With the purpose to increase rigidity and extend life, such self-aligning ball bearing is made of high-quality bearing steel materials. 5Spindle bearings keeps imported materials polished, which enables to save energy consumption and high speed.