Description: -The front shaft, gear and pulley set is designed to achieve TRUE operation for the front gear drive assembly. This design is improved over stock shaft by eliminating the need of applying glue on the shafts. It also comes with a CNC aluminum front pulley to eliminate the stripping of stock plastic front pulley. The front aluminum pulley fits perfectly on the new tail shaft and is held securely by set screws on the slot of the steel shaft. Moreover, the blue CNC gear is made of super strong material and is CNC machined to guarantee roundness and wobble-free. This system is designed to improve performance on Mini Titan E325 helicopters. Includes: -1 x CNC steel shaft -2 x CNC brass washers. -1 x CNC delrin blue gear -1 x CNC aluminum front pulley -2 x precision ABEC-5 bearings -allen key and hardware included. Requires: -Assembly -Loctite (#242 recommended) all set screws. Weight: 4.3g Usage: -Thunder Tiger Mini Titan E325 helicopters Instruction: -Included in the package Features: Stronger CNC steel shaft for less susceptable to bending. Pre-assembly 2 of 3x8x4 precision bearings to ensure super smoothness operation. No more glueing the bearings on front shaft! CNC machined delrin blue gear with guaranteed roundness and zero wobbling! CNC machined aluminum front pulley to eliminate stripping problem of stock plastic front pulley.