A VFL is used to detect faults, breaks, or bends in fiber optic cables by emitting a bright red light that is visible even through the fiber's jacket. Check each product page for other buying options. Optical Fiber Cold Splicing Tool Kit by RGC offers Miller pliers, optical power meter, and red light pen. Ideal for FTTX, FTTH, and FTTB networks. comWe offer our customers an extensive product range of cold light cables with accessories as well as innovative solutions according to your individual requirements. The operation is convenient and fast without fusion.