Hartford Ventilation Air Vent Deflector - Heavy Duty Unbreakable Plastic with Magnet Secure Design - Easy Adjust Between 8”-14” - Vent Deflector for Air Conditioning/Heat/AC/Under Furniture (1)

Worked well. Strong magnet and installation so easy. Fit the vent perfectly.

This feels pretty sturdy and has a good range of adjustability. The issue I had was that the magnets aren't in a good position and the screws on the register protruded just enough to not let the mags contact. I fixed mine by drilling holes were the register screws were and ran the screw through both. Only took a minute and since mine is ceiling mounted, it's now 100% secure. Had to modify, but still well worth it.

I have a vent in my office by the window and whenever the furnace is on, the heat blows up and into the curtains, so a lot of the heat is lost in the winter. I've got mine extended as far as it goes since I have a 14" vent and there is a very small amount of heat that makes its way through where the 2 pieces meet. Overall, I am very pleased with this. I wish I got this sooner, as I've been freezing every winter while trying to play games on my PC. I also have to get used to this being on the ground because I accidentally kick it and disassemble it every time I get near the window lol. A little on the flimsy side but it does its job!

Magnets don't work on aluminum which is what most registers are made of including mine. So, I just velcroed it and it does what it's supposed to do.

Keeps the air from blowing right on top of me

This one was to small for my vent. Measure and get a larger size than you need. It is thin and flimsy compared to the one I am replacing. Has good strong magnets. If I my vent was half the size this would have worked well enough.

Attached easily and does what it's supposed to. Extends to fit perfectly. Directs the air flow across the room.

Complete junk. Broke the first day, my dog tripped over it and one of the sides with the magnet snapped right off. Do not buy