Add the Dreambaby 7 in. Extension your Chelsea Extra Tall Gate (not included) to extend it to fit a wide opening in your household. This steel, pressure-mounted extension measures 7 in. wide and 39.4 in. high and easily attaches to your gate without the use of tools. From the Manufacturer Widen your Extra Tall Dreambaby Chelsea Series gate with this 7 inch extension. This extension can be used with any extra tall gate from the Dreambaby Chelsea Series.