Big Horn 19100 5/8" Conveyor Roller Ball Transfer Bearings, Set of 6 Ball supported movement around 360-Degree | Each assembly is 7/8 tall and can support up to 33lbs | Excel where shop materials are pushed and turned in all directions Provides adequate non-linear support for warehouse carton rolling platform, roller tables and other applications 5/8 diameter ball bearing rolls inside a precisely formed steel body with 1/8 ball bearings acting as a metal base for smooth movement | Hole Pattern: Two 1/4 Holes  1-1/2 apart Total Size (Approx.) : 31.75 x 21.60 x 12.70mm / 1.25 x 0.85 x 0.5 (L*W*H) | Comes with 12pcs of screws For use bearing side up only, not for use as castor wheels | Suitable for small machinery, trolleys, furniture and rack, etc.