Our vacuum rated convoluted hose is a popular choice for demanding applications in the chemical processing, pulp and paper, automotive and turbine engine industries. Series WCV is a helical, convoluted, heavy wall, non-conductive PTFE hose externally reinforced with PTFE impregnated fiberglass and a stainless steel wire wrapped in the root of the convolution under the stainless steel wire braid reinforcement. Series BCV is similar but is made of conductive PTFE.