Harley Davidson Cylinder Head Temp Gauge.NOS.OEM.Part # 75002-77.Fits Sportster Models XLS,XLCH,XL 1977-81.Fits Shovelhead Models 1977-83.This auction is for the Gauge,Mounting Clamp, & Light Assembly.New and never mounted,this Gauge is Cool.You will need to get a sending unit from Harley or any other company that sells them.Thanks for looking.