Superior Electric RVA1505L RV Power Cord Adapter 30 amp Male to 30 amp Twist Lock Female Camper Detachable - Walmart.com
25 ft. x 10 Gauge Four Prong Twist-Lock 30A L14-30 Generator Extension Cord
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 Trailer