What's In The Box: 4 x Tires. Each package includes four rubber wheel tires, meeting your long-term replacement needs,Compatible Models: Compatible with All iRobot Roomba 500 and 600 Series 510, 520, 521, 530, 531, 532, 533, 534, 535, 536, 537, 540, 541, 545, 550, 551, 552, 555, 560, 561, 562, 563, 564, 565, 566, 570, 571, 572, 573, 577, 580, 581, 585, 587, 589, 590, 595, 599, 606, 610, 611, 612, 614, 615, 616, 618, 619, 620, 621, 625, 627, 630, 635, 637, 640, 643, 645, 650, 651, 652, 655, 660, 665, 667, 670, 671, 675, 676, 677, 680, 681, 685, 690, 691, 692, 693, 694, 695, 696, 697, 698,Compatibility: Compatible with All iRobot Roomba 700, 800, 900 Series 760, 761, 770, 780, 790, 801, 805, 850, 860, 870, 877, 880, 890, 891, 895, 960, 961, 980, 981, 985. Compatible with All iRobot Roomba e, i, j & S Series e5(5150), e5(5134), e6(6198), i3(3150), i3+(3550), i4(4150), i4+(4552), i6, i6+(6550), i7(7150), i7+(7550), i8, i8+(8550), j7(7150), j7+(7550), S9(9150), S9+(9550),Efficiency and Performance: Anti-Slip, Great Adhesion and Easy Assembly. Tire patterns reduce noise and provide a quiet and comfortable experience,Shipping and Installation: Shipping with a strong box to prevent from being damaged in transit. It is easy to be replaced and installed on your robot vacuums