Carlson 24-Inch Extension for Maxi Pet Gate Cover wider opening by adding this 24-inch extension kit to your Carlson Extra Wide Pet Gate, model #1210PW Simple no tolls required set up; For added stability use wall cups Only compatible with Carlson Maxi Gate, 1210PW Extension kit dimensions 24-inch wide by 30-inches tall See attached user guide for assistance with set up and fit related questions