Premium foam vacuum filter is made with high quality and eco-friendly material to ensure the filters endurance. To enhance the filters performance it is washable and reusable. Rinse the filter under clean water and allow the filter to dry completely. *Please make sure filter is fully dry before installing.* | | Premium foam filter is compatible with Shark Lift Away NZ850UK NZ850UKT AZ912UK AZ912UKT. | | Foam captures up to 99.97% of particles, as small as 0.3 microns. Our premium filters are made with the best quality to keep your home as clean as possible. | | Dimensions: 4.5 in x 5 in x 1.5 in, 4 Premium foam filter included. Suggested to clean every 2-4 weeks and replaced every 3-6 months. 100%