HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. The filter can maintain the cleaning performance of the sweeper, while reducing the penetration of dust, pollen and other allergens into the air you breathe Fine preliminary Filter traps larger particles in the air like dust, hairs, pet fur, lint and more Strong suction and sweeping of fine dust, hair, debris and other daily ground garbage. With the anti tangle cleaning design, it is clean, less maintenance and more worry free. As part of normal maintenance, it can be easily removed and replaced The powerful cleaning function makes household cleaning more time-saving and labor-saving. It is suitable for a variety of floors such as ceramic tiles, marble, and wood floors. Compatible Models: For Bissell CrossWave HF2/3845N/3831 Colour:As Shown Material:plastic Package Contents: 2 x roller Brush 2 x HEPA Filter Only the above package content, other products are not included. Note: Light reflection 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.