PetSafe Plastic Pet Door with Soft Tinted Flap DURABLE PLASTIC FRAME - best for single pet homes or for moderate use PAINTABLE WHITE FRAME - customize the frame to match your door color and dcor SNAP-ON CLOSING PANEL - keeps your pet from using the pet door, to close off openign when ot in use and to help keep out weather and drafts SOFT, VINYL FLAP - flexible flap allows for your pet's comfort and ease of use. Large: Pet size- Up to 100 pounds. Frame dimensions- 12 1/2 x 19 3/4 inches. Cut out- 11 1/4 x 19 inches FLEXIBLE, EASY INSTALLATION - for thin exterior or interior people doors 1/16" to thicker doors up to 2"; includes detailed instructions, cutting template and installation hardware. BEST FOR PETS UP TO 100 lb. - flap opening size 10 1/8" W x 16 1/4" H