Support rings:
For cylindrical outside surface
R10-R15
R14.5-R30
R25-R50
R11-R13
For cylindrical inside surface
R12.5-R17
R16.5-R30
For spherical outside surface
SR10-SR15
SR14.5-SR30
SR11-R13
For spherical inside surface
SR12.5-R17
SR16.5-R30
For cylindrical outside surface.
radius adjustable R10-∞