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Skytec Delrin gear A for Walkera Lama400 with 2.5mm inner diameter (for stock inner shaft or Xtreme shaft)
The self-lubricating polymer Delrin is a lot stronger than stock plastic! In addition, the Skytec gear is slightly thicker, which also increases stability. But the main difference is the use of a 0.5modulus instead of the stock 0.4. This means, the there are less teeth on the gear, but those are stronger and bigger. It is not as easy to strip the gear anymore as it was before.