Everything you need for the ball joint connections on each leg. The pack includes tapped ball bearings (M3, 8mm OD), 6×3mm neodymium magnets with a 3mm through-hole, and M3×8mm double-ended threaded studs.

The magnets snap to the top plate to form the upper pivot point on each leg. The tapped bearings and studs handle the lower connection at the servo arm. Pack of 7 covers all 6 legs with one spare.