Visual Fault Locator (VFL), Fiber Optic Cable Tester Meter with 2.5mm Connector for Fiber Fault Finding, Up to 10KM: Amazon.co.uk: Stationery & Office Supplies
Visual fault finder - VFF5 - Identifies and locates faults in fibre optic cabling
Fiber Optic Visual Fault Locator VFL SM MM 10mW 650nm up to 10km - Cablematic
FTTH Pen Type Plastic Visual Fault Locator 10KM Fiber Optic Cable Tester Test Tool : Amazon.co.uk: DIY & Tools