Carlson Pet Products Carlson Extension Pack for Extra Tall Pet Gate 4-inches long by 41-inches tall. This extension kit allows you to expand your Carlson Extra Tall Pet Gate Allow you to cover wider openings Easy set up with no tools required This extension is ONLY compatible with the 41" Extra Tall Pet Gate. Model #0741, 0938PW, 0941PB DS, 0941PP DS, 0943PM, 0945PW