Single ended Electronic type Pump. Positive earth. Large capacity 12 Volt with minimum flow of 12.5 gallons per hour. "Stepped" top end cap.Fits :Jaguar Mk7 (1950-1956)Jaguar Mk8 (1956-1958)Jaguar Mk9 (1959-1961)XK120 (1948-1954)XK140 (1954-1957)XK150 (1957-1961)