75908 Cole Hersee, high current disconnect switch, 2000A intermittent (30 Sec on, 3 Min off), 300A continuous, 6-36VDC, Two positions: Off-On. Disconnects battery circuit only. Mounting stem: 3/4" -16 thread. Fits panels up to 1/4" (6.4mm) thick. Terminals: Two 1/2" -20 copper studs. Case: Plated steel. Sealing: sealed between shaft and mounting stem; case and terminal insulator.