Quick Products 12 in. Twist Lock Adapter Cord 15 Amp Male to 30 Amp Twist Lock QP-15M30T012 - The Home Depot
RV Marine | Trailer Extension Cord 30 Amp Male with Grip Handle to 30 — Conversions Technology
Amazon.com : 3 Prong 30 Amp Twist Lock Adapter, Generator to RV Adapter Cord with Handle, L5-30P Twist Lock Male to TT-30R Female, Heavy Duty STW 10 AWG for Generator to RV