Modulus (a constant indicating the relation between a physical effect and the force producing it.) Also know as Tensile modulus is important to understand. Graphite rods with high modulus are without high tensile strength, and this creates a brittle rod. This is how
companies can build the low end inexpensive rods. In this process important steps are skipped in the process which leads to inferior rods sold for cheap prices. When steps are not skipped and temperatures are at the max a great graphite rods are made.
CASTMATE ROD RACKS