Filter dust, filter the exhaust air, protect the vacuum cleaner motor Reduce dust, pollen and other into the air you breathe Washable & Reusable filters ,Simply rinse with clean water and let it completely air dry before reusing them Recommended to replace Filters every 3-4 month. It depends on your usage. The dirty filter may reduce suction efficiency. Fitment:For PCL720 18V 1+ Cordless Stick Vac, PBLSV716 18V 1+ Cordless Pet Stick Vac, PBLSV717 PBLSV717K 18V 1+ Cordless Pet Stick Vac Colour:Photo Color Material:plastic Package Contents: 3 x Filter Replacement 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.