General description Replacement Parts HEPA Filter compatible with Shark NV70, NV71, NV90, and NV95 vacuum cleaners. Made from high-strength, environmentally friendly materials, these filters are designed to maintain the cleaning performance of your vacuum while reducing the penetration of dust, pollen, and other allergens into the air you breathe. It is recommended to replace the filters every 1 to 2 months for optimal performance. Technical specifications Material: Plastic Package Contents: 2 x Filters, 4 x Filter Cotton Measurement allowed error: +/- 1-3 cm