4 in. L x 1.78 in. W x 1 in. D Add-a-Depth Switch Box Ring, 1-Pack

“Add-a-Depth” switch box ring allows you to adjust the depth of a switch box when it was incorrectly installed into the wall. The ring acts as a barrier between combustible wall surfaces and the wiring system. It has an adjustment range of 1/4 in. – 1 in.”,”highlights”:[“Acts as a barrier between combustible wall surfaces and wiring”,”Used with single and two-gang device boxes”,”Has an adjustment range of 1/4 in. – 1in.”