Bearing (1/2" I.D. x 1-1/8" O.D.)

hi all,

i need buy bearing spec "bearing (1/2" i.d. x 1-1/8" o.d.)".

what meaning of 1-1/8"? 

is mean 1 , 1 eighth inch?  or, mean 1 minus 1 eighth inch?

ps: please forgive me asking obvious question. 

1.125"

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Bearing (1/2" I.D. x 1-1/8" O.D.)

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