Bottom Bracket bearing frequently used in Shimano HT2 bottom brackets. 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 inner seal (face toward the inside of your hub) is an "LLB" light contact double-lip seal..

DIMENSIONS ....... 24mm x 37mm x 7mm
SEALS ...... LLB inner seal/ LLU outer seal
BALL MATERIAL .....Chromium Steel
BALL GRADE ............... 5
RACES ........ Chromium Steel
APPLICATION .... Bottom Bracket
GREASE ... Realube Bearing Compound