BR-R550 M70CT4 replacement cartridge insertFor severe conditionsCOMPATIBLE MODEL: BR-M970, BR-M960, BR-M951, BR-M950, BR-M770, BR-M760, BR-M750, BR-M739, BR-M600, BR-M580, BR-M570, BR-M530, BR-M510, BR-M432, BR-M431, BR-M430, BR-M422, BR-M421, BR-M420, BR-M330, BR-R573, BR-R550, BR-R463, BR-T780, BR-T670, BR-T660, BR-T610, BR-T300, BR-MX70, BR-MC18COMPATIBLE SERIES: XTR M970 Series, XTR M960 Series, XTR M950 Series, DEORE XT M770 Series, DEORE XT M760 Series, DEORE XT M750 Series, DEORE XT M737 Series, DEORE XT T780 Series, DEORE M530 Series, DEORE M510 Series, DEORE T610 Series, SHIMANO DEORE LX M580 Series, SHIMANO DEORE LX M570 Series, SHIMANO DEORE LX M560 Series, SHIMANO DEORE LX T670 Series, SHIMANO DEORE LX T660 Series, SHIMANO ALIVIO M430 Series, SHIMANO ALIVIO M410 Series, ACERA M330 Series, ALTUS CT95 Series, NEXAVE T300 Series, DXR MX70 Series, SHIMANO