Designed especially for use with BEST WPD39M and WPD38I Outdoor hoods in a standard installation mounted directly to the wall. The flexible telescopic flue extension is used with ceiling heights from 10' to 12' high | Brushed corrosion resistant stainless steel construction is durable, easy to clean and a perfect match to BEST outdoor range hoods | Integrated rails keep the upper and lower flue sections aligned to keep the flues straight and even | Designed with an easy-to-install mounting bracket for simple installation