Product details:

This cord uses NEMA TT-30P and NEMA TT-30R. The TT in this configuration stands literally for Travel Trailer. The 30 means that these configurations are rated for 30 amps.This cable is an STW 10/3 (0.67 in. / 17.0 mm (+/- 0.2)) (three wires). This cable is rated STW for extra hard-usage, thermoplastic insulation, and weather tolerance.