Due to Its Excellent Flexibility, The Metal Sleeeve Is Great for Laying Lines on Surface with All Kinds of Irregularites and Twists. Previously, Only An Uninsulated Sleeeve, That is, Not Protected by the Outer Shell, Was Proposed ON THE MARKET. A similar metal-burbining in the Weather Became Quite Quickly Unsuitable for Further Operation, Due to the Fact that Galvanized Tape, Which IS WAS Corroded. To Extend the Service Life of this Product, Consumers Had to Subject to Special Processing of IDE.