It is product of high-quality non-woven material, dust-proof and breathable, with nice filtering effect. Effectively filtering of grime and allergic particles; Cleaning indoors stinky smell, like cigarette smoke and many others ; Keep indoor air fresh. A bag there are 12 pieces of double-sided adhesive tape inside, which are used to stick on 4 corners of the filter screen. colour:white material:Non-woven size:40x35cm Package Contents: 6*Air conditioning clear out Only the above equipment content, varied merchandise usually are not included. Note: Light taking pictures and assorted exhibits may cause the colour of the item within the photograph a piece different from the genuine thing. The length allowed error is +/- 1-3cm.