Features:The filter is light weight, easy to install and easy to use. Made of premium filter material, highly efficient and more durable. The first layer (front side) of the two-sided pleated filter is the electrostatic dust collection filter that works to collect the charged dust, pollen, mould spore and other allergens. The photocatalytic Ti filter (second layer) works on the reverse side where odour, bacteria and viruses are adsorbed and decomposed. Effective filter dust and harmful substances, regular replacement of the old filter will help your machine work properly. Specification:Condition:100% Brand New Material: Filter paper Color: As shown in the picture Size: Approx.307x71x13mm / 12.1x2.8x0.5in Weight: Approx.117g/4.1oz Package List: 3 x Filter Screen .