[High Efficiency Filter]: Composed of composite PP and PET filter paper, this i3 robot vacuum cleaner filter replacement can effectively block 99.98% of pollutants as small as 0.3 Micrometres, making a huge contribution to protecting the health of your family. [ E I Series Filter]: This i7 vacuum filter replacement is suitable for e, i and j series E5(5150) E6(6198) i3(3150) i3+(3550) i4(4150) i4+ i6 +( 6550) i7(7150) ) i7+i7+(7550) i8 i8+ j7(7150) j7+(7550) Plus Robot Vacuum Cleaner. Note: j7+/plus filter comes in two sizes, they look very similar, please check product size 2 in the picture. [Easy to Install]: This high-efficiency filter replacement is very easy to install on your vacuum cleaner, no tools required. Tip: To keep your robot vacuum running at optimal performance, we recommend cleaning the filter with a small cleaning brush once a week or twice a week, cleaning it with pets , and replacing it every 2-3 months once. [Cleaning Methods and Recommendations]In order to protect the electrostatic adsorption ability, please use a small cleaning brush to lightly clean the i3 i7 robot vacuum cleaner filter elements regularly with replacement, which may bring profits and extend the HEPA service life by 3 times. Please note that this i3 robot vacuum cleaner filter replacement is not washable. [Package List]The package contains 12 high-efficiency i3 i7 robot vacuum filters. This robotic vacuum filter replacement measures 2.56 inches x 1.97 inches x 0.78 inches. Before purchasing, check the size of your replacement vacuum filter, especially the j7++ model, which comes in two sizes. Colour:black Material:hepa Package Contents: 12 x Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.