"Thanks for the seamless exchange. I received the unit yesterday & will install it today. So far, I am simply using an interference fit as they all fit snugly on the lead flashing. I may shorten them some, but otherwise, they are just what we needed."
A FLutz, FL
"They could not be easier to install, however, and I am about to order a third Critter Quitter® for a 4" vent.