Ideal Pet Products Designer Series Plastic Pet Door with Telescoping Frame, Extra-Large, 10.5" x 15" Flap Size

We developed a sturdy thermoplastic telescoping frame; flexible vinyl flap; a floating sill to insure good closure; and a strong molded ABS lock-out slide to restrict the pet's movements when necessary. Then we made it 4 sizes for pets up to 120 pounds. And with a tamper proof mounting system and easy installation, it's the most economical pet door in the industry.