PetSafe® Alluminum Wall Entry Pet Door Carriers & Strollers Exterior Material Bottom: 100% Polyester

Exterior Material Bottom: 100% Polyester

The bottom of the ramp has rubber grippers to maintain its position

Caution: Not for use with aggressive dogs

Pet Size: Small

Easy fold mechanism

PetSafe® Alluminum Wall Entry Pet Door Carriers & Strollers Exterior Material Bottom: 100% PolyesterGive your pets the freedom they deserve. Features include: Telescoping tunnel which allows for installation in walls 4 3 4" to 7 1 4" thick Double flap system insulates for energy efficiency Durable, white aluminum frame with dark trim Single locking cover fits on the inside or outside Easy do it yourself kit complete with instructions Lifetime limited warranty Small: Flap Opening: 5 1 4"W x 7 1 2"H; Cut Out : 6 3 8"W x 10 1 16"H; Outside Overall: 9 1