The Tapping Hole Brick is a sort of combination refractory and manufactured without burning. Its main raw material includes high-pure electric-smelting magnesia and pure graphite, it also contains multitude of reagents. The Tapping Hole Brick has characteristics of good resistance for corrosion and erosion. This products is mainly used for discharge port, converter, ,tapping hole line, wrapping of converter and electric arc. It can be supplied with single piece and a whole set after combination.