Ideal Pet Products DDXLW Deluxe Pet Door

Features inner telescoping frame that adapts to doors of 1 2” to 1 3 4” thickness. High quality aluminum construction. Clear flap allows pet to see if slide isn’t in place. Tamper proof mounting, door can’t be removed from outside. Thermo Insulated Lockout Slide. Available in 3 sizes for pets up to 120 lb. White. No. DDSW : Small, 5” x 7” flap, for dogs up to 12 lb. No. DDMW : Medium, 7” x 11 1 4” flap, for dogs up to 35 lb. No. DDXLW : Extra large, 10 1 2” x 15” flap, for dogs up to 90 lb. No. DDSLW : Super large, 15” x 20” flap, for dogs up to 120 lb.