These patchcords are made of Nufern S630-HP fibers for use from 600-860nm.

Nufern?ˉs pure silica core fibers are optimized for use at visible wavelengths from 400 up to 700 nm. These high-performance fibers were developed for applications such as RGB components requiring couplers, diode pigtails and unique delivery needs. The pure silica core fibers were designed for more demanding applications that require lower attenuation and higher resistance to radiation and color center
formation compared to germanium-doped fibers.