FLAT FITCHES - NO4 - 8MM FERRULE / NO6 - 9.5MM FERRULE / NO8 - 12.7MM FERRULE / NO10 - 19MM FERRULE / NO12 - 22MM FERRULE. ROUND FITCHES - NO2 - 3.2MM FERRULE / NO4 - 4.8MM FERRULE / NO6 - 6.4MM FERRULE / NO8 - 9.5MM FERRULE / NO20 - 12.7MM FERRULE / NO12 - 16MM FERRULE.
