1、Fit for ilife A7 A9S. 2、Made of ABS material, more durable and can use for long time. 3、Reduce dust, pollen and other allergens into the air you breathe. 4、It is suggested that it should be replaced every 2-3 months. 5、The set are include 6 filters, 1 sponge, 4 pcs brush and 1 screw driver. Features: Fit for ilife A7 A9S. Made of ABS material, more durable and can use for long time. Reduce dust, pollen and other allergens into the air you breathe. It is suggested that it should be replaced every 2-3 months. The set are include 6 filters, 1 sponge, 4 pcs brush and 1 screw driver. Specification: Material: ABS Filter: 14 x 4.7 x 0.9 cm / 5.51 x 1.85 x 0.35 inch (appr.) Package List: 6 x Filters 1 x Sponge 4 x Brush 1 x Screw driver