Conntek RL14306 RV 50-Amp 30-Feet Heavy Duty Extension Cord
RV Camp Power Extension Cord, 50A 125/250V, Stays flexible in cold weather, Heat Resistant up to 221F, NEMA 14-50P to NEMA 14-50R Approval: Plug, 30FT STW 6/3+8/1: UL, C-UL.