Guest Extra-Duty On/Off Diesel Power Battery Switch One Size. Rugged internal components are protected by a tough impact-resistant polycarbonate housing that is impervious to the elements. They also feature Alternator Field Disconnect (AFD) allowing selection of any position including "off" without damage to the alternator or electrical system.Features:Guest 2304A Extra-Duty On/Off Diesel Power Battery Switch Model: 2304AFor 6 12 24 or 36V systemsCable lug size: 1/2" Specifications for Guest Extra-Duty On/Off Diesel Power Battery Switch: Manufacturer: Guest Color: Grey Package Contents: Guest Extra-Duty On/Off Diesel Power Battery Switch Guest 2304A: Extra-Duty On/Off Diesel Power Battery Switch One Size