Optic pigtail (optic mounting cord) is intented for fiber termination by welding, or by mechanical splice. Optic pigtail - is a piece of optic fiber in a bufer shell 0.9mm connectores on one side. Pigtail can be produce with shell of different dimension, but for installing inside a cross, it's better to have a pigtail that is thinner and it's better suited to 0.9mm connector buffer shell. Next we must weld the pigtail to the cable optic feber and then put them into the splice cassette and connect it to an appropriate optical adapter. 

Connector types: SC, FC, ST, LC, MT-RJ. Polish types: PC (Physical Contact), SPC (Super Physical Contact), UPC (Ultra Physical Contact), APC (Angled Physical Contact).