New box extender or spark guard, designed to close the gap on fire vulnerable material!5 pack to 100 pack w/ volume discounts – unbeatable!Functions with all standard devices Switches, and GFCIsWorks in 2 gang plastic and 4 Inch square electrical boxes with 2 gang plaster rings for single switches or receptacleManufactured from 105 degree C continuous use 94VO rated flame retardant plastic for safer installationsGreat value, buy more!Levels and supports the wiring device where the box is set back from the wall surface (adjusts up to a 1-1/2 Inch box extension)Thank you for looking!We also have 1 gang and many other products!