This package includes 5 sets of 2 electrical extensors and 20 screws, which can be combined into 10 sets of 1 extension box. You get enough economy suitable for daily use and replacement, thereby saving your timeBuy again with money. Our socket extensor is made of high temperature resistance 94VO rated flame retardant plastic material. It has good flame retardant persuitable formance and structure, which can be used suitable for a long time without damage. Our electric box extender is suitable suitable for portable electrical boxes and 4-inch square electric boxes, with gypsum rings to extend the electric box to 1-1/2 inch.Self -adjusting support of sockets, switches, GFCI, sockets and other standard equipment. Unlike the socket section used in the distribution box, this socket extensor ensures safe and reliable installation. After the installation is completed, the non -metal side wall is completely closed to suitable form an Colour: White Material: plastic Package Contents: 1set x electrical box extender 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.