Adds 31.25 to Auto Close Gate with extension, gate fits openings 97.75 to 100.5 wide. Made of heavy metal construction. Maximum of three extensions 1, 2, 5 and 11- bar extensions expand your standard gate up to 125. Designed for use with the North States Auto-Close gate. 31.25 x 30 Extension for Auto-Close Wall Mounted Pet Gate NS4819 Color: White