Single Circuit ON-OFF with Locking Key - Red. 300 Amps continuous rating for outboards and small gasoline or diesel engines. Tin-plated copper studs for maximum conductivity and corrosion resistance. Studs accept 3/8" (M10) ring terminals. 7/8" (22 mm) stud length accepts multiple cable terminals. Blue Sea Systems one-piece terminal stud design never loosens over time. One-piece stainless flange nuts ensure safe and secure connections. Isolating cover protects rear contacts. Breakout tabs allow wire access in any direction. Specifications:. Switch Type: Single Circuit ON-OFF. Color: Red. Maximum Voltage: 48V DC. Continuous Rating: 300A. Intermittent Rating: 500A. Cranking Rating 30 sec: 900A. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.Specifications:. Box Dimensions: 4"H x 4"W x 7"L WT: 0.65