Killark ECF-14 - Bronze flexible metal construction - An inner liner of asphaltum impregnated jute fibre tubing to protect conductors - Female ends with removable zinc plated steel nipples standard on all couplings - Union type couplings may be assembled by adding a GUF Series union to the nipple - Special lengths available-consult factory Killark’s harsh and hazardous ECF series flexible couplings offers access to areas where movement or vibration requires connection or a difficult bend is required. Our flex coupling’s inner liner is saturated with an asphaltum jute fiber tubing for the upmost protection in conductivity. This series comes with a removable zinc plated steel nipple and is made with a braided bronze finish. Application: For use in hazardous areas where movement or vibration requires a flexible connection or a difficult bend is required in a conduit system.