Package: You will receive 8 pieces of 4x12 inch floor vent filters, enough for daily cleaning and replacement. Due to different vent sizes, you need to remove your vent cover and measure the vent opening size before purchasing. Easy to Use: The floor vent screens are for 4x12 floor registers. Easy installation and disassembly, you just need to attach the floor register mesh trap to the back of the cover and insert them into the vent. No tools needed. Catches Debris: The floor vent filter can catch any debris that may fall into the vent, such as hair, dust, jewelry, trash, rings, coins, earrings, and keys. This is to keep the ventilation ducts clean and free of obstructions at all times. Ventilation: The floor vent screens do not obstruct airflow and have good breathability. Effectively prevents dust and debris and always keeps the ventilation ducts clean and the room well ventilated. Please note: Slight color difference or difference in type does not affect use, please be aware of this, thank you! Color: Black Material: Plastic Size: 4x12 inch Package Contents: 8 * Floor Register Cover Trap Only the above package content, others are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.