Our range of composite insulator: Suspension Insulator: 12~220kV (End fitting avaibale:socket,ball,clevis,tongue,Y clevis,eye) Pin type insulator:15kV,24kV,33kV ANSI class DS series:15kV,25kV28kV35kV Station Post Insulator:15kV,36kV,69kV,132kV Line Post Insulator:33kV,69kV,115kV,138kV If you are interested in our products,please contact me for more informations. material: 1. The core is the indoor insulating part of the insulators used to guarantee the mechanical charging placed on the lines. It is done of fibreglass laid in a resin matrix, in such a way to get the maximal holding to the traction. The core is circular. 2. The covering (sheds)is the insulating outdoor part of the insulator, it is made of silicon rubber, it serves to insure the necessary creepage and it saves the core from bad weather. 3. The metallic endings of the insulators done of steel mould and warmly galvanized.