42mm External to CS Mount Microscope Objective Adapter Ring

5-30mm Microscope Objective RMS Extenders Parfocal Length Extension Ring Adapter

27mm External to 32mm Internal Microscope Objective Adapter Ring

42mm External to 23.2mm Eyepiece Microscope Adapter Ring

Microscope Objectives RMS to RMS Parfocal Length Extension Tube Ring 5mm-30mm

External RMS to CS Mount Microscope Objective Adapter Ring

External RMS to 25mm Internal Microscope Objective Adapter Ring

External RMS to 26mm Internal Microscope Objective Adapter Ring