Varistor voltage from 18V to 1800V, ontology diameter Φ5，Φ7，Φ10，Φ14，Φ20.
The monomer with the flow of up to 10KA or more, ontology diameter Φ5，Φ7，Φ10，Φ14，Φ20.
Ontology diameter Φ25，Φ32，Φ40，Φ50 and 34*34 square pieces, and other customized specifications.
