1. Made of good material, extra durable. 2. Fine initial Filter traps larger particles within the air like dust, hairs, pet fur, lint and extra 3. HEPA clear out is made of high-strength environmental-friendly materials, that may block most of grime right down to 0 micrometer. The filter out can maintain the cleaning functionality of the sweeper, while reducing the penetration of dust, pollen and other allergens into the air you breathe 4. Premium grade HEPA filter captures 99% of airborne debris down to 0 micrometer in size 5. Easy to replace and disposable, no devices required. replace filters every single 6 months for optimal performance. Model:For DEWALT DCV501LN/DCV501HB Type:Vacuum Cleaner Accessories Quantity:4Pcs Colour:Black-White Material:plastic Size:88x71mm Package Contents: four * HEPA Filters Only the above package content, other item aren't included. Note: Light mirrored image and diverse exhibits could cause the color of the item within the photograph a bit various from the real thing. The size allowed error is +/- 1-3cm.