Moeller Replacement Direct Site Gauge For Mechanical Senders With a direct sight gauge or with the conversion capsule gathers fuel level information with the float. While accurate, the gauge will fluctuate as the fuel in the tank "sloshes" around the tank when boating because of the moving parts - the float. BRAND: MOELLER, PART NUMBER: 035759-10 , 03575910 Fuel Tank Boat Marine Accessories