[[File: fiberferrulesandshrink.JPG|thumbnail|200 px|A 2x2 mm square waveguide, 2 ferrules, and heat-shrink used to mount the ferrules and supports.]] | [[File: fiberferrulesandshrink.JPG|thumbnail|200 px|A 2x2 mm square waveguide, 2 ferrules, and heat-shrink used to mount the ferrules and supports.]] |