-The new precision cnc tail blade grips set is designed with thrust bearings for VIBE 90SE helicopter. The tail rotor blade grip is equipped with thrust bearings and designed to have double bearings on each blade grip to improve the performance of the tail blade grips. With double bearings on each blade grip, the play between the tail rotor hub and the blade grips is significantly reduced. It is much better than stock plastic tail rotor. It is compatible with stock tail rotor hub. It also uses high quality socket hex scews and lock nuts to secure the blades on the tail blade grips.-Silver anodizing version.