R188 Deep Groove Ball Bearing 1/4"x1/2"x1/8" Open Type Z2 Lever Bearing 5pcs - Walmart.com
R188 Hybrid Ceramic Bearings
R188 Ceramic Ball Bearing 1/4 x 1/2 x 3/16 Inch Bearing – ACER Racing
HXHV Hybrid ceramic bearing R188 with s.s. crown retainer and 10 ZrO2 balls-Hxh Bearing Co., Ltd.
R188-ZZ Bearing 1/4 Inch x 1/2 Inch x 3/16 Inch Both Sides Metal Shielded and Pre-Lubricated with Grease Radial Miniature Ball Bearing: Amazon.com: Industrial & Scientific