This is a new unused Neptune Direct Drive Portable Mixer, Heavy Duty, Clamp Mount, Model C-1.6. This mixer is part of Neptune's original line of larger, direct drive portable mixers for mixing larger batches of light and medium solutions, or small batches of heavy fluids.
Comes with standard 316SS propeller, muffler, and instruction manual with parts list. I do not have the propeller shaft. Shaft is 3/4" diameter, and these are available in various lengths and coatings from numerous Neptune distributors.