− | File:fiberferrulesandshrink.JPG|A 2x2 mm square waveguide, 2 ferrules, and heat-shrink used to mount the ferrules and supports | + | File:fiberferrulesandshrink.JPG|A 2x2 mm square waveguide, 2 ferrules, and heat-shrink used to mount the ferrules and supports to the collars |