It is made of high-quality non-woven material, dust-proof and breathable, with good filtering effect. Effectively filtering of dust and allergic particles; Cleaning indoors smelly smell, like smoke etc ; Keep indoor air fresh. A bag there are 12 pieces of double-sided adhesive tape inside, which are used to stick on four corners of the filter screen. colour:white material:Non-woven size:40x35cm Package Contents: 6*Air conditioning filter Only the above package content, other products are not included. Note: Light 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.