Weight: BH59 52g/set BH90 50g/set. BH59 is suitable for Hydraulic disc brakes of Simano, models MT200, m315, m355, for M365, m395, m396, 45, 46, 47, m505, m525, m775, etc. BH90 is suitable for Simon hydraulic disc brake models m506, m596, m615, m666, m675, m7000T750, m785, m8000, m8020, m985, m9000, R7020, R7025, R8020, R8070, R9170, R9120, R9180, R70070, R80 R9170, etc.