Ceramic Raschig rings: Size:100mm, Good quality Delivery fastly, strictly quality control used in high or low temp.conditions Pingxiang Zhongying's Packing is a good manufacture for Metal, Ceramic ,Plastic PackingsHigh strength, Good quality, low price Pingxiang City Zhongying's Packing have more than 20 years in this lineStrictly quality control.Low priceAvailable Material: Ceramic ,Alumina or ...