8 K14.5-30
For testing spherical outside
surface SR14.5~SR30
9 HK11-13
For testing spherical inside
surface SR11~SR13
10 HK12.5-17
For testing spherical inside
surface SR12.5~SR17
11 HK16.5-30
For testing spherical inside
surface SR16.5~SR30
12
UN
For testing cylindrical outside
surface,radius adjustable
R10~∞
20