General description vhbw offers a high-quality air filter designed to minimize health-hazardous dust during renovation, construction, or DIY work. This pre-filter for air purifiers effectively removes impurities from the air, ensuring a cleaner environment. Its uniform pore size captures large dirt particles before the air reaches the main filter, providing efficient and reliable filtration without the need for additional tools during installation. Technical specifications Filter class: G4 Dimensions (L x W x H): 41.7 x 32.6 x 8.4 cm Material: paper / foam Colour: white Weight: 350 g Other information Content of delivery: 2x pre filter Regular filter changes are essential to maintain high-performance filtration.