C60-TUBE-B: Nikon Multi-Element Tube Lens Assembly uses Nikon 200 mm FL tube lens, clear aperture Ø30 mm, female C60 on collimated side

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)