C65M-C60F-ADPT: Adapter C65 male and C60 female. Adds 6 mm axial space. C65 side has 37 mm clear aperture

C60-EXT-10-2: Extension tube with 2mm lateral offset of ports, 10mm long w/ male to female C60-RING mounts. Typically used between TIRF condensing lens and objective (to better use the center of collimating and TIRF lenses)