The AFL 2900-50-0010MR 1.25mm Adapter Cap is for use with the handheld OTDRs and OLS series light sources. Both multimode and single mode test ports are equipped with tool-free, switchable adapter mounts. Test Port Adapter Cap allows OTDRs and light sources to interface launch cables with a variety of connector styles. Compatible with C850, C860, M200, M650, M700, OFL-250 & OFL280 OTDRs as well as OLS1-Dual, OLS2-Dual, OLS4 and OLS7 series light sources. This 1.25mm adapter also fits the VFI2 and VFI3 HiLite Visual Fault Locators (VFL's).