This aluminum spinner is designed for use with folding props.
The spinner is 1.75 inches diameter at the base, and measures 1.85 inches long from base to the tip of the spinner cone. It incorporates a collet-style adapter to secure the spinner to a 3.17 mm motor shaft.
The propeller mounting tabs are spaced at 0.31 inches (8 mm) and have a hole diameter of 0.16 inches (4 mm). Screws, washers and nuts are included.
The weight of the spinner assembly (without props) is 1.3 ounces (36.85 grams).