Carlson Extra Tall Walk-Through Pet Gate with Pet Door, White, 29-36.5in Wide Brand new in original factory packaging with plastic wrap intact. Carlson Extra Tall Walk-Through Gate, model 0941 PW DS. Color: White. Fits openings 29 to 36.5 inches wide, 36 inches tall. Includes a built-in small pet door. Not for use on stairs. Wall cups required for installation.