PERKO Spare Flapper for Thru-Hull Scuppers Marine Connectors Is this a sealed battery

Is this a sealed battery

Cover: Wrapped black EPDM rubber

163 and newer) and Simrad multifunction displays (sw version 20

ITU-R M493-13 Class D Digital Selective Calling

PERKO Spare Flapper for Thru-Hull Scuppers Marine Connectors Is this a sealed batteryThe PERKO Spare Flapper is a replacement part designed for select PERKO thru hull scuppers. Compatible with Figure No. 0333 (Thru Hull Scupper for transom mounting) and Figure No. 0343 (Adjustable Thru Hull Scupper), this flapper helps maintain proper drainage and prevents backflow into your vessel. Built with marine grade durability, its an essential spare to keep your boats drainage system performing reliably.