Fixed Seat Pedestal with Swivel

Fixed seat pedestal with swivel. 
Per the manufacturer, this pedestal measures 12-1/2"; we measure it to be approximately 13-1/2" H x 9" Dia. overall. The pedestal base mounts via (6) 1/4" Dia. holes set apart approximately 4" center to center.
Features 6-5/8" x 6-5/8" swivel head that hosts a custom 5-1/4" x 5-1/4" slotted mounting pattern.
The manufacturer has rated this pedestal AN: Not to be used for the helm/driver seat.
Material : Anodized Aluminum.
Dimensions : 12-1/2".
Overall Dimensions : 13-1/2" H x 9" Dia.
Mounts :  (6) 1/4" Dia. Holes Set Apart 4" Center to Center.
Mounting Pattern :  5-1/4" x 5-1/4" Slotted.