ParkPower by Marinco generator adapter with 20A 125/250V locking male 3-prong plug and 30A 125V female connector. Used to connect standard 30A RV cordset to a generator equipped with a 20A, 4-prong locking receptacle (L14-20R). Made of one one-piece unbreakable PVC housing with rugged weather resistant construction, and nickel-plated blades resistant to corrosion.