NTN Bearing 6203LLBC3/EM Single Row Deep Groove Radial Ball Bearing, Electric Motor Quality, Non-Contact, C3 Clearance, Steel Cage, 17 mm Bore ID, 40 mm OD, 12 mm Width, Double Sealed Deep groove geometry for high speeds Single row for supporting radial loads Steel cage evenly spaces balls for reduced friction, vibration and noise Non-contact rubber seal on both sides to keep lubricant in and contaminants out C3 radial clearance allows thermal expansion for continuous operating temperatures up to 120 degrees C/248 degrees F