Moeller red switch Fuel Sender These senders are quality constructed of non-corrosive components and feature a stainless steel and composite sensing shaft; reducing false signals and providing years of reliable use. Industry standard 5-bolt mounting flange. Ideal for gasoline or diesel fuels. Length to order should be at least 1" less than tank depth for plastic tanks, and 3/4" less for metal tanks. Comes complete with mounting screws and gasket