FERGUSSON ø 1,5 mm,
F.G. Charr: 4 – 5, 16 cm/6¼”
FERGUSSON ø 2,0 mm,
F.G. Charr: 6, 13 cm/5”
Outer Ø: 11,7 mm/35 Charr., Inner Ø: 10,7 Charr.