Bearing Protector Cover; 1.78 Inch Diameter; Vinyl; The Bearing Buddy(R) Bra is a vinyl cover that fits over the Bearing Buddy(R) to contain excess grease and keep it off tires and wheels. The Bearing Buddy(R) Bra is easily removed for checking hub lubricant level. If excess grease accumulates inside the bra, periodically clean it out.