MIL-SPEC WIRE & CABLEManufacturing Mil-Spec and Aerospace cables demands perfection. Since 1965, Harbour has played the leadership role enabling the company to supply a complete line of high temperature wire and cables that meet customers quality and performance requirements. The following constructions outline just a few of the Mil-Spec and Commercial wire and cables that Harbour manufactures.Extruded PTFE Up to 1000 V and 260 C.Mineral Filled Extruded PTFE Up to 600 V and 260 C.Extruded ETFE Up to 600 V and 150 C.