TruAire Floor Register Trap 4 in. x 12 in. (2-Pack)

4 in. Height x 12 in. Width Floor Register Trap (2-Pack). Our H150TRAP 04X12 is a simple design that will prevents items from falling into ductwork. This item is easy to install and easy to remove for cleaning.Prevents items from falling into ductworkEasy to install and remove for cleaningDoes not hamper air flowMeasuring tip: register fits floor opening plus/minus 1/2 in.; measure inside duct opening for accurate sizing