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