A catalog of the company’s gas vent products, L201, offers various items in the categories of gas vent systems, Dura/Connect® single- and double-wall connectors, and DuraFlex® relinings. Photographs, line drawings, descriptions, and sizing charts make up the bulk of the data in this 28-page catalog. A venting chart, a vent termination table, and rules for venting gas appliances safely are enclosed, as well as information about the company’s warranties and customer service center.