Bearings are sold individually and not in pairs. Best all-steel bearing for wheel hubs. Note that this wheel bearing has a grey "LLU" outer seal that is a medium contact double-lip seal to help keep contaminants out. The black inner seal (faces toward the inside of your hub) is an "LLB" light contact double-lip seal.

"61806LLU-LLB" bearing. Best all steel bearing for wheel hubs.

DIMENSIONS ....... 30mm x 42mm x 7mm
SEALS ...... LLU outer/LLB inner
BALL MATERIAL .....Chromium Steel
BALL GRADE ............... 5
RACES ........ Chromium Steel
APPLICATION .... Wheel Hub and Bottom Bracket
GREASE ... Realube Bearing Compound