Features:1.Compatible with Roomba i7 Plus i7+ (7550) i3+ (3550) i4+(4552) i6+ (6550) i8+ (8550) s9+ (9550) j7+ (7550) I & S & J Series Robot Vacuum Cleaners.2.Made of high-strength materials to ensure optimal performance and a healthier lifestyle.3.For best results, Vacuum Dust Bags and filters should be replaced every 2 - 3 months.4.Well compatible with your vacuum robot, You can easily install and use. 5.Package Included 12 pieces of automatic dirt disposal bags.Notice:Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement.Description:Material: non-woven cloth, plasticSize: 6.3*5.5*5.1inchColor/Style: As the picture shownincludes:10/12 x Vacuum Bag Replacement