It`s made from Hi-lime or large crystal fused magnesite, flake graphite, bonde with resole and novolac resin. Taphole Brick for EBTIt`s made from Hi-lime or large crystal fused magnesite, flake graphite , adding various additives like metal and boride , bonded with resole and novolac resin , It`s high density , high strength , high purity and has good corrosion resistance and good high ...