Junction Boxes manufactured from Halogen-free ABS & Polycarbonate, which offers superior resistance to chemicals and atmospheric agents ( Operating Temperature -20 C to +85 C ) with silicon rubber gaskets with a screw-type offer in grey color & transparent..Junction boxes are an essential part of the electrical wiring systems for homes, buildings, and Industrial alike. These metal or plastic boxes house and safely protect a structure's electrical connections. These electrical casings come in many sizes and types.