Halex 75212B 1-1/4-Inch RGD Plastic Insulating Bushing 1-1/4-inch's long Indoor or outdoor use, To UL and CSA requirements Flame-retardant to 105-degrees Celsius High impact thermoplastic 25 Pieces per box For indoors or outdoors Use on threaded Rigid or IMC conduit to protect the wires Required by NED High impact thermoplastic Flame-retardant to 105-Degree C