PRODUCT SIZE:AIRTAK electrical outlet box 2.75 "deep, 26 cubic" capacity. There is plenty of room inside for you to wire, and the junction box contains cable clamps to better secure the wires. The package includes 3pcs SAFE AND DURABLE: Our electrical outlet boxes have a two-hour fire rating to provide good security for your electrical system and ensure the safe use of electricity in your home or commercial space. ETL CERTIFIED FOR SAFETY:Our power outlet boxes are made of high-quality materials and have been rigorously tested and are ETL certified to ensure the safety and reliability of your electrical installation EASY INSTALLATION:Designed specifically for old work, this power socket box is an ideal device for retrofitting your home or business space efficiently and safely EXTENSIVE USE:AIRTAK's electrical outlet box is suitable for a variety of installation environments and retrofit needs. It can be either an electrical junction box or a pow