Springfield Uni Lock Table Mount Part Manufacturer: Springfield Marine, Part Number: 1660704 / 3660704, UPC: 038132910508 Has (1) 2 3/8" inner diameter mounting hole, and measures approximately 7" diameter x 2 1/2" high overall Designed to mount to the underside of any table for easy removal and storage Mounts with (6) approximately 1/4" countersunk mounting holes spaced in a 5" mounting pattern per manufacturer Sold as seen in pictures; Note every computer shows colors differently; All measurements are approximate; Hardware and instruction/installation manual not included