Keep things looking sharp, light and your electronics cooler with these hollowed spinner. These 51mm Air-Flow spinners have a backplate that is 51mm (2 inches) in diameter with an overall length of 46.6mm (1.83 inches). Backplates with a pair of M3 x 6mm socket-head screws, which require a 2.5mm hex wrench to tighten.
The aluminum backplates have large lightening holes in them to allow cooling air to pass through. These holes also decrease weight and rotational mass of the spinner for quicker motor acceleration. The backplates have a raised knurled area on both sides around the center hole, which provides a firm grip on both the back side of the propeller and on the face of the motor’s prop adapter. The spinner backplates have an 8mm mounting hole in the center and comes with a set of plastic reducing adapters so they can also fit onto 6mm, 5mm, 4mm or 3mm motor shafts.
Diameter: 51mm / length: 46.6mm
Center hole: 8MM w/ adapters to fit 6mm,5mm, 4mm or 3mm motor shafts.