3.0mm solid core optical fiber sold in two spool lengths. All of our Sidelight Fiber Optics are completely flexible and feature a superb light transmission for bright and consistent illumination. The cable also emits light through the end of the cable. Minimum bend radius is 18mm. Core Diameter 3.0mm (0.118″) Overall diameter 4.5mm (0.177″) Photo showing dimension has protective sheathing removed. The fiber spool is available in two lengths. Click to download a spec sheet.