Teel 1P816 flexible impeller pump, self priming, bronze housing. 1/2 inch stainless shaft, 1/2 inch npt threads. New in original box, but in storage for many years, so the box looks rough. I did not try to turn it, but it may need a new impeller due to age. The current equivalent on Grainger is the 3ACA9 costing $390. $20 fedex ground shipping with tracking to lower 48.