PetSafe 310 Cat Flap Tunnel Extensions High Tech Pet Products Magnets line the perimeter of

Magnets line the perimeter of the flap to stay sealed in 50mph winds (can be removed temporarily for training purposes)

For more doggy door replacement parts see Magnador replacement flaps and parts

Spring-loaded panel adjustment for quick installation in most vinyl window sizes

Spring-loaded mechanism installs easily into the window track

Your new dog door means pets won't wake you up anymore to go outside

PetSafe 310 Cat Flap Tunnel Extensions High Tech Pet Products Magnets line the perimeter ofWall tunnels designed to allow wall installation for the PetSafe Cat Door 4 Way Locking Flap Each wall extension tunnel section provides 1 7 8 in. framing Measure the wall thickness before purchasing pet door extension pieces Make sure you have enough wall liners to match the wall thickness Available in white only, but can be painted Item has been discontinued The PetSafe 310 cat wall tunnel sections are designed to frame out the Petsafe 4 Way Locking