The FAMCO Plastic Bath Fan / Kitchen Exhaust Roof Vent with Stem, also referred to as a BVDS Exhaust Vent, is made of High Density Polyethylene (HDP). HDP is one of the most versatile and widely used plastics available. Outdoor integrity is maintained in this, and all of our plastic products, by the addition of UV inhibitors, which protect the material from deteriorating in the sunlight. The stem on the BVDS can be removed for hard connect applications. The FAMCO BVDS is available in black, dark brown, wood gray, and white. It also comes in two different sizes, allowing it to connect to either a 4 inch or 6 inch duct-exhaust line. The FAMCO BVDS Exhaust Vent is proudly manufactured in the USA by Famco and includes a 1-year warranty against product defects and workmanship. If you have questions regarding this vent, please check out the FAQs above or contact us directly by phone or email.