Diameters:
F101.** from 4 to 100 mm.
F110.00 from 70 to 100 mm. with 4 djustable sectors
F110.10 from 90 to 140 mm. with 4 adjustable sectors
F110.20 from 130 to 180 mm. with 6 adjustable sectors
F110.30 from 180 to 240 mm. with 6 adjustable sectors
F110.40 from 140 to 360 mm. with 10 adjustable sectors