Polyurethene MW-79C - JW 117741B CL -155 - CLASS 155 Insulation Characteristics: All the characteristics of polyurethane 130C plus the increased thermal rating to class 155C, solderable at 680F. General Applications: R.F. coils, solenoids, encapsulated coils, motors, relays, low voltage transformers, ignition coils, layer and precision wound coils. Part Number Code: _PUNEMA Standard (MW 1000): MW-79-C Federal Spec. (JW 1177B): JW 117741B CL-155 SPU, SPU2, SPU3, SPU4Military Spec. (MIL W 583C): None Available in Gauges 4-60Single or Heavy Build Insulation