It is product of advantageous non-woven material, dust-proof and breathable, with good filtering effect. Effectively filtering of filth and allergic particles; Cleaning indoors smelly smell, like smoke and so forth ; Keep indoor air . A bag there are 12 goods of double-sided adhesive tape inside, which are used to adhere on four corners of the filter out screen. colour:white material:Non-woven size:40x35cm Package Contents: 6*Air conditioning filter out Only the above package content, diversified item aren't included. Note: Light and diversified displays could cause the colour of the thing within the photograph slightly assorted from the genuine thing. The dimension allowed error is +/- 1-3cm.