This module by Delock can be used to extend an optical fiber. With its standardised dimensions it can be used for easy snap-in mounting in e. g. a Keystone patchpanel, face plate or surface-mount box. Specification https://elecena.pl/product/18160182/86372-keystone-module-fc-simplex-female-gt-female 2021-04-30 https://elecena.pl/product/18160182/86372-keystone-module-fc-simplex-female-gt-female 2021-09-23