The Prime Twist Lock Adapter splits the feed from one power source to create two 30-Amp inlets on a boat. It features a heavy-duty marine-grade plug that twist to lock and two connectors with waterproof seals. This Twist Lock Plug Adapter has a 50-amp plug and two 30-amp connectors that allow flexibility in temperature and is flame retardant. This adapter is also abrasion and water resistant and features oversized strain reliefs so that the plug and the connector will not separate from the wire. Meet your electrical power source needs while boating with this Twist-to-Lock Marine "Y" Adapter.