{PERFECT MATCH} - Reproduction parts for iRobot Roomba are compatible with iRobot Roomba I-Series i7(7150) i7+ i7 plus(7550) i1+(1552) i4+(4550 4552) i3+(3550) i6+(6550) i8+(855) 50),E-Series E-Series (E5 ( E5134) E6 (E6198) E7,J Series j7+ (7550). This kit is as good as the original. {EFFICIENT} - Two high quality multi-surface rubber brushes are perfectly matched, one to remove dirt and the other to remove grime. {Easy to Replace} - Replacement parts are cleaned regularly to improve suction and perforation for longer life. For optimal performance, Roomba's multi-sided rubber brushes should be replaced every 6 months. {Valuable Package} - Replacement accessory kit includes 2 sets of dual multi-surface rubber brushes. {FULL SERVICE} - {FULL SERVICE} - If you have any questions about the Replacement Kit for your iRobot Roomba, we will get back to you within 24 hours.