Robinson Racing Products Extra Hard .8 Module (31.75P) 20T 5mm Bore Pinion Gear .8 Module (31.75P) 20T 5mm Bore Pinion Gear
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Robinson Racing Products Extra Hard .8 Module (31.75P) 20T 5mm Bore Pinion Gear Part# 0-RRP8720
Extra Hard Steel 5mmm Bore (.8 module) Brushless Motor Pinions. One 4x4 mm set screw included.
Length: 0.47" (12mm) Mounting hole diameter: 5mm