Lasting Construction & Performance: Our single electrical box is made of quality plastic materials, which can be installed in commercial, industrial or residential environment, stand the test of time and provide reliable performance in the next few years. Safe: Unlike other outlet spacers for distribution boxes, this outlet box extender can ensure safe and secure installation. Once installed, the non-metallic sidewalls completely surround the unit, creating an insulating barrier. Wide Applications: Our electrical box extenders are designed to provide solutions for extending electrical box plastics to accommodate new or existing wiring. Function: Designed to install easily and securely in single, double, and triple electrical boxes: Even with heavy equipment or wires inside, 1-Gang Extension Electrical Box for extending an electrical box to 1-1/2 inch power outlet box extender stay safe and stable in a variety of electrical boxes. Material: plastic colour: white Package Contents: 6 x single gang box extender 12 x screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.