Set of six oversized pins.
All dropper posts require key way clearance. With so many different frames, clamps and ride heights it's not possible to ship play-free without running the risk of binding. The kit is meant to remove additional play that might develop over time or, for the more mechanically inclined, to tune the play out for a specific bike.
Start with the 3 pins marked with 2 lines. If play still exists move to the 3 pins marked with 4 lines.