... -temperature kiln calcination,finally are made into ceramic rollers. We take unique forming technology,with strict standards of JC413-91 and ISO9001 ... ,Argentina,Poland,Malaysia and other countries and areas with good reputation. Product Features: Ceramic rollers as a refractory kiln furniture, is a ... )≤0.07% LRoundness(mm)≤0.5SizeΦ21-60mm,Length≤4800mm ceramic rollers with diameter 20-60mm