Motor Gear Pinion for Electric are available in a wide range of Modulus and Teeth counts for a variety of Model RC Helicopters and gear ratios.
Modulus .5 for 450 size Helicopters (e.g. Trex-450, NEM-450SE, Mini Titan and etc..)
Modulus .6 for 500 size R/C Helicopters (e..g. 3DX-500, Trex-500, Hirobo Lepton and etc..)
Modulus .7 for 600 size / 50 class Helicopters (e.g. Trex-600, Hurrican 50, X-treme 50, X50-2009 and etc..)
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HELICOPTERS 
