PART: 12305-E - MOULDER CUTTER HEADS - LENGHTS 2.25”, 3”, 4”, 5”, 6” - BORE 1-13/16” - BORE 2-1/8"WITHOUT BUSHING - BORE 2-1/8" USED - VERY GOOD CONDITIONS North American Gladu hydro-lock 6 wing 20 degrees Interior diameter (bore): 1-13/16” External diameter: 6” (150 mm) Lenght 2-1/4” (57 mm) Lenght 3” (75 mm) Lenght 4” (102 mm) Lenght 5” (130 mm) Lenght 6” (152 mm)