STOMPER FOR BIR GRINDER MODEL 722, 812, 822. Replacement stomper that works with select meat grinders. Fits Brand(s): Biro Includes: (1) Stomper Replaces: GR98 Fits Model(s): 722, 812, 822. Fits Brand(s): Biro. Fits Model(s): 722, 812, 822. Sorry, our items are NOT available for pick-up. No additional information at this time. You might also like. HOBART CARRIAGE THUMB SCREW. Sharpener assembly and cover, polished Aluminum, for Berkel Slicers 808 – 817. RETAINER AND SEAL ASSY FOR FRONT/REAR DRIVE SHAFTS, replaces 292675. BEARING RETAINER ONLY FOR FRONT/REAR DRIVE SHAFTS.