Beckson Marine PRT-B Replacement Safety Twist Knobs Only 1/4-20 Black (2 Per, Pack) PHBILG3 0 BCG(60Hz)/5

0 BCG(60Hz)/5

Second Control Unit for NavPilot 711C

or any of eight internationally acknowledged warning signals

Used on engines with closed cooling

and tracking are transferred via the global Iridium satellite network

Beckson Marine PRT-B Replacement Safety Twist Knobs Only 1/4-20 Black (2 Per, Pack) PHBILG3 0 BCG(60Hz)/5Designed with drain molded on inside of spigot. Promotes drainage without angle cuts in hull. Allow for thru bolting. Seats tightly against gasket and lens omitting internal water retention ledge. No water fall when opening after a rain. Ideal for mounting where installation is within 15 of vertical or where no drain is necessary. Patented. All self drain ports have a White body and a clear window. 1" spigot.