Product Quality: Our outlet box extenders are made of high temperature plastic material, good flame retardant, reliable and , finely processed products, more stable quality, and can stand the test of time. Function: This electrical outlet box extender is used to extend the electrical box to 1-1/2inch. Automatically levels and supports receptacles, switches, GFCIs, receptacles and other standard equipment. Features: Continuous, smooth, non-metallic side walls enclose devices completely creating an insulating barrier between the device and the metal box. Safe: Unlike other outlet spacers for distribution boxes, this outlet box extender can safe and secure installation. Colour:White Material:plastic Package Contents: 10 x 1-gang box extender 20 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.