Ideal's Designer Series Plastic Pet Door was developed with your Ideal Pet’s safety and sense of adventure in mind. Impact-resistant frame that adapts to doors ranging from 1-1/4 to 2 in thickness. Flexible, tinted vinyl flap with patented edges that won’t warp from use or extreme temperatures. Floating bottom threshold for perfect seal every time. Lock-out slide to keep your Ideal Pet out of mischief when unsupervised. Average install time: 20 minutes. For pets 91 - 120 lbs. Flap size 15 x 20 Cutout size 16.5 x 22.25 Door thickness range 1.25 - 2