Lens spacer for Sisma SWT is ideal for deep channels and slots in molds. Attach to the laser microscope lens for extended reach. Stack up to 4 spacers  adding 218.5mm (8.6") for maximum reach.  Diameter is  53mm (2.09") and measures 54.5mm in length (2.15"). Kit includes spacer for SWT lens, protection for rapid connection of SWT lens, Loc-line segment for argon supply (5) (yellow), O-ring seal. Made in Italy.