The Smart Plug 50 Amp Retrofit Kit includes the 50 Amp Stainless Inlet (BM50S) and the 50 Amp Connector (BF50), everything you need to protect your boat from shore power overheating and burning. Installation of both components is easy. The kit is designed to fit on 125/250 volt systems with multiple seals on the connector to ensure a watertight fit on an existing cordset. Two separate cord seals that are included allow for installation on a 125V or 250V cable.