This high quality generic Flush Box Sponges, corresponding with part number KY-42889 which is discontinued by Mutoh, is suitable for Mutoh Rockhopper II - III printers. This set of six sponges fits the spitting box.
 
Printer compatibility
Mutoh Blizzard 65
Mutoh Blizzard 90
Mutoh RJ-8000-50 (Falcon II)
Mutoh RJ-8000-64 (Falcon II)
Mutoh RJ-8000-87 (Falcon II)
Mutoh Rockhopper 3 65
Mutoh Rockhopper 3 90
Mutoh Rockhopper 3 Extreme 65
Mutoh Rockhopper 3 Extreme 90
Mutoh Rockhopper II 50
Mutoh Rockhopper II 64
Mutoh Rockhopper II 87
Mutoh Rockhopper II-2H
Mutoh Rockhopper II-4H
Mutoh Spitfire 100 Extreme
Mutoh Spitfire 65
Mutoh Spitfire 90