At the heart of Ziebel’s proprietary technology is the 0.6 inch diameter Z-Rod® composite carbon rod which deploys the fiber optic strands or cables securely into the wellbore. The rod carries 2 multi-mode strands and 4 single mode strands enclosed in a stainless steel tube. The composite is made of longitudinal carbon fibers bound together in a polymer matrix. It is light and extremely strong (more than 10 tons in tension) while being chemically stable and compatible for service in all normally found well fluids.