brand and high quality Made of high-quality materials, more durable Exquisite and delicate, highly match with the equipment The pre filter is crucially important compatible suction power and suction efficiency, you need to deep clean or replace the filter periodically to prevent suction loss The pre filter is rinsable, please rinse under cold running water, then give it 24 hours to be dried completely be compatiblee reinstalling Solid and durable, long service life Easy to install and reliable to use Specifications: Replaces #8542023991 pre filter of your Cordless vacuum. Compatible models: compatible Tineco A10/A11 Hero, A10/A11 Master, PURE ONE S11 Series Cordless Vacuum Cleaners. : Material:plastic Package Contents: 1 x roller brush 2 x Pre-filter 2 x Post-filter 1 x clean brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.