Siren Marine SmartPlug 50 Amp Non Metallic Black Inlet - Boat & RV Side Ships within United States Free shipping with Fishbrain Pro. Sign up here. Share Loading Facebook Like button... Siren Marine SmartPlug 50 Amp Non Metallic Black Inlet - Boat & RV Side Ships within United States Free shipping with Fishbrain Pro. Sign up here. Share Loading Facebook Like button...