Better brand than what I've been planning on using. This brand is sold at Grainger, a long time well known industrial supplier. I doubt I'd be lucky enough to find longer ones on clearance for my sides and if I bought this brand, it would be $2400 which ain't happening. I'll get the DIY units which will cost me $600. When/of they fail, I might replace one at a time with the good ones or I might not. Those are low to the ground and easy to swap. The gable vents will require a ladder to install/repair so I'm grateful to have stumbled on these.