Prevents door slamming from the HVAC running. Significantly improves air circulation between rooms
Air passes right through the vents keeping everything in better balance when doors are closed
Easy to install, takes about 10 minutes. Screws are included
Material: plastic; Many colors available to match your design. Fits together nicely
HOW TO INSTALL: Measure and draw lines on the door, just drill 4 holes in corners and use a jigsaw to cut the 4 lines, pop in the vents and screw them together