SCT Schmidt Thread Extension Tube / Spacer Ring, 1/2 inch
This spacer has male SCT Schmidt threads on one side, female SCT
threads on the other side. Spacing is 1/2 inch, center opening is 1.77",
outside diameter is 2.175". Black anodized alumium, interior is
baffled. Great for adjusting SCT focal reducer spacing.
Prices include shipping in the USA!