GenTran 25-Foot 6/4 Generator Twist Lock to NEMA 1450 Extension Cord with 50-Amp Connections RJB06425-1450P (Discontinued by Manufacturer) GenTran contractor extension cord set is a safe, convenient way to power electric tools and appliances using a portable generator Ideal for jobsites when GFCIs are required to comply with OSHA Duplex receptacles are housed in an aluminum weatherproof junction box with spring-loaded cover Made with UL Listed components; 125-volt use (30-amp) Model RJB06425-1450P