Replaces many Plycraft and Selig.
Tilter and Chair base.
If you have this model tilter mechanism as shown in Picture #2, a mounting board is not required.
Otherwise, a mounting board is required.
It's a kit of everything needed from under seat to the floor.
1- #7109M Chrome Hand Polished Leg Base
5- #301 Pre-Installed Floor Glides
1- #61F Chrome Stand Pipe/Column
1- #402P Heavy Duty Swivel Tilter