Rare Stevens ESCO Diving Helmet Air Supply Pump. It is 14" tall and 13" wide without the handle. The pump cylinders are different sizes...2-1/2" in diameter and 3-1/2" in diameter. Both are 5-1-/2" tall. Cylinders are brass as well as the check valves that the hose attaches to. Handle is included. OVER THE NEXT SEVERAL WEEKS WE WILL BE LISTING MANY OTHER AUTHENTIC NAUTICAL ITEMS. FEEL FREE TO ASK ABOUT OTHER ITEMS.