Schaefer 57″ fiberglass exhaust fan is the ideal solution for dairymen seeking superior performance and efficiency in a manageable package for tunnel and cross ventilation applications. Heavy-duty, UV protected, polyethylene cone maintains its shape and greatly increases fan performance. Built to last, and specifically designed to fit side-by-side in dairies with standard post spacings, Schaefer 57″ fiberglass exhaust fans deliver unrivaled return on investment. Ships fully assembled, complete with aluminum inlet shutter and self-adjusting belt tensioner. Cone added in the field.