10-Pack R188ZZ Bearings 1/4" x 1/2" x 3/16" - 1/4" Bore Bearings Nachi Spherical Roller Thrust Bearing S6700ZZ Comes with double metal

S6700ZZ Comes with double metal shields (ZZ) to keep out dust and dirt

both are Hybrid Ceramic ABEC-7 Ball Bearings that fits Midwest Dental Quiet Air handpiece

S6203ZZ Shielded Ball Bearing

7012CYP4 Nachi Ball Bearing

10-Pack R188ZZ Bearings 1/4" x 1/2" x 3/16" - 1/4" Bore Bearings Nachi Spherical Roller Thrust Bearing S6700ZZ Comes with double metalSet of 10 R188ZZ Miniature Bearings 1 4" ID 1 2" OD 3 16" Wide This is a 10 pack of R188ZZ miniature deep groove ball bearings, perfect for replacing multiple units in one go. Each bearing features double metal shields to block out dust and comes pre greased for smooth, low maintenance performance. Ideal for yo yos, RC gear, and small precision parts. Type: Deep groove ball bearings Inside diameter: 1 4 inch (6. 35mm) Outside diameter: 1 2 inch (12.