Perlite Filter Aid: GK-110 Perlite Filter Aid (GK-110) is a regular product of our company. It is white solid powder through expanding, modifying, purfying and grading the natural qualified perlite ore in Shangtianti Mine, Xinyang City, Henan Province. Its molecular structure is alveolate and it is a tasteless, nontoxic and abacterial inert material without organics.Product Features:(1) It is ...