100% brand new and high quality. Compatible with A10/A11 Master, A10/A11 Hero, A10 Dash, S11 cordless vacuum cleaners. Changing the pre-filter in time can improve the service life of the vacuum cleaner. To keep the best indoor cleaning environment. Strict quality control standards to build and test. High wear resistance and excellent durability. Color: as shown Material: plastic Package Contents: 12 x Filter Elements Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.