[Application]6 pieces of floor vent cover size was fit 4 x 12 inch register damper box perfectly.But not work for flush mounted registers.It causes nearly no noise when working. [Function]These floor register filter catches debris keys, rings, necklaces, earrings, coins, etc. Prevent them falls into the air vents. [Easy Install]Simply fit the floor register mesh trap to the back of the register cover and insert them into the vent. When remove for cleaning, just pull it, no need other tools. [Material]Adopt mesh design and stretch fabric material, but with great durability and practicality, which can be applied for a long time, not affect normal ventilation, ensuring air circulation. [Package & Reminder]Before purchase: for many sizes of vents in your home, please make sure this air vent screen is the right size.Please do regular cleaning of the trap.<br><br>color: Black Material: polyester mesh+PVC size: 30.5 x 10cm<br><br>Package Contents: 6 x Vent Covers<br><br>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.