Martin? W 4-1/2" QD 4-Bolt Flange Bushing 4-1/2" Bore 15" OD

Used condition. Removed from an industrial air compressor.
4-1/2" bore dia.
1-1/4" keyway width.
15" flange OD.
11-1/2" length thru bore.
1"-7 bolt size. 12" bolt length.
292 lbs.