Easiest door ever to install: No screws or hardware needed, just snap together. High-impact plastic in decorator white. Fits doors from 1 1/4" - 2" thick. Closing panel to restrict the pets use that fits on both the inside and outside. Unique flap design provides weather resistant seal. Soft, transparent vinyl flap is easy for your pet to open/use. Lifetime warranty. Small – 4.25” x 7” (max weight of the pet 12lbs).