This is a cast/CNC balanced brass propeller with a stainless steel conical M4 propeller nut and drive dog for the Traxxas DCB M41.
Prop Diameter: 42mm (1.65 inch)
Prop Pitch: 60mm (2.36 inch)
Prop Nut Length: 18.3mm (0.72 inch)
Prop Nut Diameter: 8mm (0.31 inch)