Southwire Topaz (C10CG) 4″ Rigid Conduit Body C-Type w Cover and Gasket Southwire Topaz (C10CG) 4″ Rigid Conduit Body C-Type w Cover and Gasket The Southwire Topaz C10CG 4″ Rigid Conduit Body C-Type with Cover and Gasket is designed for use in rigid conduit systems, providing a secure and accessible point for wire pulling, splicing, and maintenance.