Suitable Models: Cone filter with 125 mm diameter, 180 mm length and 8 mm thickness, designed as a universal replacement for many common ventilation systems. Compatible for tiebel Eltron exhaust valve discs and disc valves from Maicop, Pluggit, Zehnder, Helios, Wolf and Nibe for reliable use. Highly Efficient Filtering: G4 filter mat made from high-quality synthetic filter material, offering a high dust holding capacity and stable structure. The G4 filter class reliably captures fine particles such as pollen, pet hair, dust and everyday pollutants, helping to reduce allergy symptoms and improve indoor air quality. Safe and Durable: The filter ventilation system is produced using a thermal adhesive process, eliminating the need for glue and ensuring a clean, odourless product. filters are tested for flame retardant performance, providing additional safety in continuous operation and guaranteeing long-lasting, consistent filtration efficiency. Easy Installation: Cone filter DN 125 is precisely shaped for quick, tool-free replacement of the old filter in the exhaust valve. The tight fit ensures maximum sealing and minimises bypass air, which improves the overall performance of the ventilation system and also contributes to a reduction of operating noise levels. Color: White Material: Polyester Package Contents: 25pcs Conical Exhaust Valve 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.