Switch, rotary enclosed, 2 Double Pole Single Throw (2 DPST) switches, each with ON-OFF-ON-OFF switching, 10 amps, 125 VAC, rated Splashproof by the military specification but the design and construction is the same as for submersible to 15 feet (SBM-15). Type 2-1SR2A4-4 in a 3x5" brass enclosure. Designed for mounting flush into a panel cutout 3.16"x 5.16" with .84" radiused corners. Gasket is provided to seal at the panel interface (splashproof). Part Number M15743/7-001 per MIL-DTL-15743/7. NSN 5930-00-049-9765. The mil-spec requires that the nameplate be stamped or engraved for the control of fwd and aft tank compartment blowers as the standard marking. If you have another application, we can supply the nameplate blank, other than the ON-OFF marking, or with marking to suit your application.