This 2.5" chocolate brown extension can be used with the Brighton security gate. Please note, you may use a total of 4 extensions, two per side, to reach a maximum of 66". For stability, it is recommended that only one 22" extension be used per gate. When installing two extensions on one side, please ensure that the smaller extension is to the outside of the gate and the larger extension is touching the actual gate frame. When mounting more than one extension on one side, remember that you can"t combine two 2.5" extensions together on the same side. Likewise, you can"t connect two 7" extensions together on the same side. You can use two 2.5" extensions and two 7" extensions on one gate by attaching one 2.5" and one 7" per side. See attached chart image for more information.