1. and excessive quality. 2 of amazing materials, and practical. three filter out can preserve the clear functionality of the vacuum cleaner, whereas decreasing the penetration of dust, pollen and diversified into the air you breathe. four installation, it can be easily removed and replaced. 5 is advised to switch it each 2-3 months or in step with your utilization to maintain the mechanical device at its best performance. Compatible Model:For T11 / T11 Pro Colour:As Shown Material:plastic Package Contents: 6 * vacuum clear out Only the above package content, various merchandise usually are not included. Note: Light reflection and various exhibits can cause the colour of the article in the photo just a little varied from the genuine thing. The size allowed error is +/- 1-3cm.