BEP Battery Distribution Cluster f Twin Inboard Engines w Three Battery Banks [718 140A DVSR] Lighting Search Lights Engineered with a short Extreme Models:ST 8410 Engineered with a short Extreme Duty Actuator and a unique mount that allows maximum plate movement and safe upward position when running in shallow water and on land Circumference 53 The 718 140A DVSR is designed for twin inboard systems when it is not practical to have both engine alternators in parallel because of the types of regulators used on these alternators 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