
450 class upgrade parts, tail pulley with groove including ball bearings
Features:
1, tail pulley with groove can effectively keep the belt on its way.
2, the inverted ladder shaped groove will protect the runing belt.
3, its maxium diameter is same as original Align one.
4,red anodic treatment.
5, including high quality ball bearings
6, it can be mounted on your helicopter without doing any changes.


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