Keeping things from falling into the vent.The floor register filter catches keys, rings, necklaces, earrings, coins, debris, etc., keep the ductwork clean. Pack of 6PCS floor vent trap, applicable to the floor register of 4x10 inches. Please measure the air registers size before purchase. The vent mesh screen can prevent small things into from floor ventilation system. Easy to install, our vent mesh trap applicable to the iron or plastic or wood floor registers. Please clean the trap regularly. This vent mesh screen blocks dog food, dog hair, lint, and other small items from falling down into the vents, big mesh does not restrict airflow through the vent. Colour:black Material:PVC Package Contents: 1 set x air vent filters 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.