We will solve your trouble in time within 6 hours. Versatile Functionality: Designed to extend portable and 4-inch square electrical boxes by 1-1/2 inches, perfectly accommodating outlets, switches, and GFCIs What You Will Receive: You will receive 20pcs of electrical box extender for portable electrical box and 40 pcs of screws that can be combined to make 20 sets of 1-gang box extender, you will get enough cost-effective quantity for your daily use and replacements, saving you time and money to buy again. Arlington Wall Box Extender Smart Fill Spacers 2-Gang Outlet Screws Included 10 Pieces BE1-2 Socket Extensions With 20 Screws, (1-Gang) Socket Extension, Single Gang Box Extension, Electrical Box Extension, 1 Gang Power Switch Non-metallic Sidewall Extender After-sales Service and Guarantee:We are committed to creating high-quality products and improving users' shopping experience! 20 PCS BE1-2 Electrical Outlet Box Extenders with 40PCS Screws, (1-Gang) Electrical Power Single Gang Box Extender Electric Box Extender 1 Gang Power Switch Receptacles Accessories : : Tools & Home Improvement About this item What You Will Receive Safe and Reliable: Unlike other outlet spacers used in distribution boxes, this electrical outlet box extender ensures a safe and reliable installation, and once installed, the non-metallic sidewalls completely enclose the unit, creating an insulating barrier. High-quality Material: Our outlet box extenders are made of high temperature resistant 94VO rated flame retardant plastic material, very good flame retardant performance and durable construction for long time use without damage.