LED Retro Fit 12v 40mm Bung Light - Blue or Green Light.

NO NEW DRILL HOLES REQUIRED. This is a pretty cool product and makes a great gift. If the boat has a large bung (40mm instead of the smaller 25mm) then this just fits straight on and fastens via the existing 4 screws. You just remove the old bung and housing and screw this one on with a bit of sealant. You don't need to drill a hole through the boat for the 12v wire as it runs internally in the black housing and then into your boat via the bung hole. Just hook it straight up to your 12v system with a simple switch and your good to go.