Needle Valve O-Rings for the O.S. FS, FX, and LA series engines. This O-Ring can also be used for other applications where a 2.5x6mm silicone o-ring is needed. NOTE: This part may ...
3x7mm Push Rod O-rings, intended for use with the O.S. 91HZ F3C, and 91HZ-PS 3D Helicopter Engines, as well as the O.S. FS-110-a, FS-120S-E, FS-120 III, FS-200S-P and FS-200S four stroke airplane ...