This is a Pelton-type water wheel for Hydro-Electric generation projects. It measures 8.03 inches in diameter (204 mm). It has 12 die-cast aluminum cups that are bolted to a center hub. The hub has a hole in the center with a diameter of 0.786 inches (20 mm), and 8 additional 0.193 inch (5 mm) holes on a 1.38 inch (35 mm) bolt circle. The Cup outside diameter is 1.820 inches. The inside diameter is 1.460, and the total height is .700 inches. The deepest part of the cup is about 0.400 inches. The nozzle should be located about 3.5 inches from the center of the wheel, tangent to the diameter, to provide the most torque and power.