Superior Electric SE 6200ZZ Replacement Ball Bearing - 10 x 30 x 9 (mm) Replaces Porter Cable 804218SV, Milwaukee 02-04-1041, Bosch 2610004595, Makita 211066-7, DeWalt 5140101-94 Side 1: Shield | Side 2: Shield | Inner Diameter: 10 mm Outer Diameter: 30 mm | Width: 9 mm Axial Load: 0.9 KN | RPM:  4000 Tolerance: ABEC-3 Class 3 | Material: E51100, 100Cr6 Bearing Life: 3 Years, varies on application