Silicone fiberglass series hoses are offered in one- and two-ply styles designed for ventilation and fume removal in temperatures from -75 to 600°F. Featuring an inner ply that provides a smooth interior for maximum flow and minimum friction loss, the two-ply hose (SF-2) is wound with a fiberglass cord, has a spring steel wire imbedded between the two plies and is heat vulcanized for optimum strength and serviceability. Lightweight, easy-to-install, and non-kinking, hose is offered in sizes from 1-12" ID and metric sizes in 12 foot standard- or custom-lengths up to 36 feet. Hi-Tech Duravent 400 E. Main St. Georgetown, MA, 01833