For hard usage applications in accordance with NEC. 10 AWG through 18 AWG, -50deg. C to 105deg. C(TPE) 300 volt rating. Portable tools, lamps. pumps, portable farm equipment, conductor soft annealed stranded copper per ASTM B3-90 Water resistant TPE, industry standard UL 62, UL1581, CSA-C22.2 No.49.