Reliance ControlsPBN20 Plastic Case Power Inlet Box, 20-Amp

Reliance Controls Corporation PBN20 20 Amp NEMA 3R Power Inlet Box for Generators Up to 5,000 Running Watts

Parkworld Generator 4-Prong 20 AMP NEMA L14-20 Extension Cord (25FT)

ELEGRP NEMA L14-20R Locking Connector, Generator Twist Lock Adapter Connector, 20 Amp 125/250V 3 Pole 4 Wire Grounding, Industrial Grade Heavy Duty, UL Listed (1 Pack, Black/White)