It is manufactured from effective non-woven material, dust-proof and breathable, with nice filtering effect. Effectively filtering of grime and allergic particles; Cleaning indoors smelly smell, like smoke and so forth ; Keep indoor air . A bag there are 12 items of double-sided adhesive tape inside, that are used to stick on 4 corners of the filter out screen. colour:white material:Non-woven size:40x35cm Package Contents: 6*Air conditioning filter out Only the above kit content, different products aren't included. Note: Light and assorted displays may cause the color of the article in the photograph a bit assorted from the genuine thing. The size allowed error is +/- 1-3cm.