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Tekno R/C TKR4173 "M5" 5mm Bore Mod 1 Pinion Gear (13T) EB48 Parts Hardened steel construction "Big Ball"Tekno R C TKR4173 "M5" 5mm Bore Mod 1 Pinion Gear (13T) This is the 13 Tooth M5 Pinion Gear Hardened Steel from Tekno RC. Features: Ideal for 1 8 scale and other MOD1 pinion applications Constructed of CNC machined steel, lightened and hardened for durability Number of teeth laser etched on shaft Includes: 13 Tooth Pinion Gear, M5 Set Screw Specs: Number of Teeth: 13 Gear Pitch: MOD1 Hole Diameter (Bore): 5mm