20 PCS vacuum bags compatible with all cleaning base and iRobot roomba i & s & j series i3 i3 Plus i3 + ( 3550 ), i4 i4 Plus i4 + ( 4552 ), i6 i6 Plus i6 + ( 6550 ), i7 i7 Plus i7 + ( 7550 ), j7 j7 Plus j7 + ( 7550 ), i8 i8 Plus i8 + ( 8550 ) s9 s9 Plus s9 + ( 9550 ) vacuum bags.
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