Check our gravely page:
I think your deck may have the same opening as the 60 inch (shown at the bottom of the page). The GCGR60Z or GCGR60ZXL will fit this. We try to show the various openings of the mowers in our mower models section of the website. Manufacturers are always changing things on their mowers, so a visual check to compare your mower is really helpful in avoiding catcher model mixups. You can always call us directly for consultation on fit issues.