Nukeproof oklo dropper seatpost rebuild kitthe nukeproof oklo rebuild kit comes with everything you need to service the seatpost to keep it in top condition features includes control rod spring ifp o ring c o ring d actuator piston shaft a control valve seat o ring e actuator spring o ring f control valve rod key needles x3 bush a piston o ring g o ring h piston shaft b oil seal seat bottom cover buynukeproof componentsat chain reaction cycles the wo