How to see if the fishing rod is carbon?

Generally speaking, high carbon steel rods are relatively light and brittle, while glass fiber rods are relatively heavy, but their toughness is relatively good. It is still difficult for non-professionals to tell whether it is carbon or not. At present, the manufacturing process of fishing rod is complicated, and it is basically difficult to distinguish it only by looking at the surface. If it is a broken joint, you can see it from the cross section. Carbon rod fibers are woven vertically and cannot cross or be horizontal. Glass fibers can be arranged and woven at will. In fact, the simplest method is to test the resistance on the fishing rod with a multimeter. The higher the carbon content, the better the conductivity, while the glass fiber is basically non-conductive. Therefore, carbon fishing rods should be avoided in thunderstorm days and under high-voltage wires to prevent lightning strikes and electric shocks.