Polished brass hand pump connects directly to engine oil dipstick tube on many popular marine engines such as OMC and MerCruiser. Features GHT fitting on top of dipstick tube Gives simple “one-hand” pumping Screws onto threaded male 3/4″ garden hose Complete with 2′ (60 cm) of 1/2″ (13 mm) ID drain hose Specifications GHT male thread fitting: 3/4″ (19 mm) ID drain hose: 1/2″ (13 mm) Length: 10 1/4″ (26 cm) Diameter: 1 1/4″ (3.2 cm) Weight: 1 lb (0.5 kg)