Lappkabel silvyn fps spiral cable conduit soft outer pvc inner sprung wire lappkabel 61737173 a lappkabel silvynreg fps spiral cable conduit with a soft pvc outer sheath and inner pvc insulated steel spring wire this conduit is dimensionally stable and suitable for outdoor use and direct burial it can be compressed extended and is resistant to oil and acidsapplications include mechanical engineering in drag chains silvynreg chain robot building moving and indoor applications