Fuel tank sender: Single station reading 12//24V. Swing-arm type. 2-1/8" (54 mm), bolt circle dia., left or right hand float arm travel.Fresh water level sender: SAE 2-1/8" bolt circle adjustable tankdepths 8-24". Installation kit included. VDO single station.Replacement US fuel sender: Includes installation kit (226451), standard ground.240-33 Ohms (E-F): Steward Warner, Datcon, Faria, Medallionand Teleflex.