Adjustable height from 43-7/8” to 46-1/2”. Thanks to its spring-loaded top, this pet door offers a handy 2.5" adjustment range Locking rigid flap is made of unbreakable clear Lexan to allow pet to see through opening and is non-toxic for added safety Flap Size: 7-1/2” x 10-1/2”. Recommended for pets 2 to 25 Pounds This Chubby Kat door includes a 4-way locking knob to keep your pet in or out. You can manually turn knob to desired position: in only, out only, free in/out and locked. The patio panel frame is elegantly white with clear tempered safety glass, blending seamlessly with your home decor.