Lappkabel silvyn conduit rill pp cable protection hose black ral 9005 lappkabel 61806535 this lappkabel silvyn conduit rill protection hose is a protective tube made of polypropylene this conduit is used wherever a subsequent wiring assembly is required but no high demand is placed on the protection this means there is no need to install a conduit gland the slit of the conduit does not run in a straight line but in a succession of waves or curves this helps small diameter cable