YNB1129 Features: * Switch box depth ring * Single and two-gang device boxes * Subject to acceptance by an electric inspector * Add a depth ring or goof-ring is designed to act as a barrier between combustible wall surfaces and the wiring system * 0.25-1" Adjustment range Includes: * Two 1.13" screws included Dimensions: * Dimensions: 4" H x 1.78" W x 1" D