Neoprene Service Entrance Roof Flashing 2-1/2″
https://dev.nsiindustries.com/product/neoprene-service-entrance-roof-flashing-2-1-2/
The Bridgeport 2-1/2″ Neoprene Service Entrance Roof Flashing prevents water from entering a building where a conduit mast comes out of the roof surface. This flashing fits flats to 45 degree angle roofs.