Ideal Pet Products PPDXL Pet Door

Features inner telescoping frame that adapts to doors of 1 1 4” to 1 3 4” thickness. Impact resistant super strong thermoplastic. Clear flap allows pet to see if slide is in place. Tamper proof mounting, door can’t be removed from outside. easy installation. Available in 3 sizes for pets up to 90 lb. No. PPDS : Small, 5” x 7” flap, for dogs up to 12 lb. No. PPDM : Medium, 7” x 11 1 4” flap, for dogs up to 35 lb. No. PPDXL : Large, 10 1 2” x 15” flap, for dogs up to 90 lb.