Practicality: These replacement dust bags are perfectly compatible with for i I,E &J Series i1,i1+,i3,i3+i4,i4+,i5,i5+,i6,i6+,i7,i7+,i8,i8+,j5,j5+,j6,j6+,j7,j7+,j8,j8+,j9,j9+,s9,s9+, models, ensuring a seamless fit and working properly with these models for optimal cleaning performance. [Over 99.9% Filtration Performance] Made of 4 layers of high-strength precision fabric, which includes a 2-layer superfine melt-blown fiber filter layer + 2-layer non-woven fabrics. Over 99.9% of dirt and hairs can be collected [ with Well-Sealed] In the stitching process, a widened 8mm seam design is adopted to make the whole bag more firm. 30 bins of dirt, debris, and other particles as small as 0.3 microns can be held by the automatic dirt disposal bag [Upgraded Self-locking Collar Design] Compare with the old style of pull-close design, an upgraded self-locking collar design can effectively prevent dust from leakage and avoid secondary contamination. Meanwhile, it doesn't throw dust around when changing the bag Quantity:12PCS Colour:As Shown Material:Non-woven fabric Package Contents: 12 * dust bags 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.