The Workhorse™ unbalanced regulator has been the standard in SCUBA diving for years. Why? Its rugged, simplistic, dependable, low cost design lends itself for use as a primary, recreational, technical and DECO regulator. This 40% Nitrox ready regulator in fact was utilized by the National Park Service as a primary SCUBA regulator in its 190+ foot dive to the B-29 bomber in Lake Mead! The Workhorse™ now comes standard with one (1) Black (installed) one (1) Green (Oxygen) and one (1) Yellow (Nitrox) cover. This is a regulator and a 40″ hose ONLY (no first stage) for use as an Octopus.