General description Replacement Parts HEPA Filter compatible with Tineco A10 Hero/Master and A11 Hero/Master vacuum cleaners. These filters are brand new, made of high-strength and environmentally friendly materials, and are easy to install. Technical specifications Material: Plastic Package Contents: 4 x Pre-filters, 2 x Post-filter elements, 1 x Cleaning brush Measurement allowed error: +/- 1-3 cm Usage It is recommended to replace the filters every 1-2 months for optimal performance. Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product.