Package: You will get 8 pack of 4x12inch floor vent trap,enough for daily replacement cleaning.Due to multiple sizes of vents,you need to remove your vent cover and measure the size of the vent opening before purchase. Easy to Use: The floor vent mesh covers is for floor register 4x12. Easy to Installation and disassembly,you only need fit the floor register mesh trap to the back of the cover and insert them into the vent.No need for any tools. Catch Debris: The floor vent trap could catches all the debris which may fall into the vent,such us hair, dust, jewelry,debris,rings, coins, earrings and key.Thus to keep the ventilation ducts clean and unobstructed at all times. Ventilation: The floor vent mesh covers will not hinder airflow and has breathability.Effectively prevent dust and debris, and always keep ventilation ducts clean and the room well ventilated. Please note:Slight color difference or difference in kind,does not affect the use, please do not mind, thank you! Colour:Black Material:Plastic Size:4x12inch Package Contents: 8 * Floor Register Cover Trap Only the above package content, other 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.