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HE Inline Gearbox 2.58:1 Gear Ratio x 5mm shaft for Speed 400 & 480 Motors
Planetary "like" with ball bearing aluminum gearbox for S-400 and S-480 long can motors. Includes pinion for your motor with 2.3mm shaft. Output shaft diameter is 5mm. It's actually got an offset counter-shaft inside and is not planetary but certainly apears to be from the outside. Like Planetary, your shaft stays on center. Will fit in glider nose or tight cowlings nicely. SKU Number: HEIGB2.58-400480-5
 "HE Inline Gearbox 2.58:1 Gear Ratio x 5mm shaft for Speed 400 & 480 Motors")