3.17mm.
Suitable for brushless motors and speed controllers.
Delicate workmanship.
Specifications:
Color: Silver
Material: Aluminum
Motor Axle hole diameter: 3.17mm
Single item size: 2.4 * 1.2cm(L * D)
Single item weight: 4g
Package weight: 21g
Package including:
1 * 3.17mm Propeller Adapter
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