DROP OUT FUSE (D.O.Fuse) ARE COMPLETE WITH FUSE CARRIER OF FIBRE GLASS TUBE WITH BOTH END HEAVILY TINNED NON FERROUS METAL PARTS. THE BRUSH TYPE PHOSPHOR BRONZE CONTACTS PROVIDE POSITIVE HIGH PRESSURE MULTILANE CONNECTION AND WIPING AND CLEANING ACTION ON CLOSING. THE PRESSURE EXERTED BY THE CONTACTS INITIATES THE OPENING MOVEMENT OF THE FUSE CARRIER COPPER & COPPER ALLOYS HIGH PRESSURE HEAVILY TINNED METAL CONTACTS FOR FIX TOP CONTACTS ASSEMBLY AND BOTTOM CONTACT ASSEMBLY. THE D.O. FUSE UNITS ARE MANUFACTURED FROM 11 KV TO  33KV SYSTEM.