Get a discount on the Greenlee FP3K-105 Fopro Fiber Optic Probe with the pros at PlumbersStock. This Fopro Fiber Optic Probe with 2.5 mm Ferrule mm 50/125 - ST-PC eliminates the need for hybrid stock of numerous test lead configurations. It has a patented design that protects delicate connector endfaces from scratches. The probe is also equipped with anti-rotation Grip prevents the endface probe from grinding against the endface connector during a test. Greenlee manufactures tool solutions that are both innovative and practical.