Combined the silicon carbide and alumina, OK909 has excellent performance in physical strength and 

thermal conductivity. The roller does not bend in critical thermal shocks. OK909 solves the problem

of heaping up and irregular moving of ceramic tiles due to the bending of roller in rapid cooling zone.

OK818 has excellent performance in critical thermal shock resistance, with working temperature 

up to 1300degree. it is specially used in the kiln for producing normal glazed tile with igh cost.