Heavy Duty Exhaust Thimble for stationary and mobile applications. Ideal for Generators, Pumps etc... mounted in trucks, trailers, sheds, buildings etc... This listing is for 2.5? exhaust Available for 2" and 3" exhaust see other listings for different sizes Used for applications where engine exhaust needs to go through a ceiling or wall while blocking the ingress of moisture rain etc.... Applications include sprayfoam insulation rigs, food trucks, mobile led rigs, etc..... It is not pictured but the interior flange is also included for a clean install Feel free to contact directly if you have questions at pdgenerators