TBCPET pet door size choose: S for dogs under 12 pounds, M for under 40 pounds, L for under 100 pounds, and XL for under 220 pounds. Please refer to the picture for measurement guidance. If unsure, contact us
Durable Steel Frame: Our pet door features a sturdy steel frame that crafted using a metal laser welding process and high-quality steel aluminum alloy oxidation to ensure durability, security, and thermal insulation
Easy Installation: Installing this pet door in your interior and exterior wall is a breeze with our step-by-step instructions and cut-out template, hardware.The telescoping tunnel allows for adjustable depth to accommodate different wall thicknesses