Made of high-strength and environmental protection material,Easy to install. It can filter fine dust very well. The filter screen can keep the cleaning performance of the sweeper and reduce the penetration of dust, pollen and other allergens into the air you breathe It is suggested that it should be replaced every 1 -2months. Care Instructions: 1. Wash the filters regularly using warm, soapy water 2. It is very important that the filters are completely dry before (24 hours) Type:For H11 color:As shown Material:plastic size:5.5cm Package Contents: 12 x Filter 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.