Filters (5) for HB4500A Standard 19" rack mount Air delivery from more than 50% of their 17" width Internal neoprene isolation mounts reduce transmission of vibration to the rack Air intake only, to pressurize the rack with filtered air Heavy steel construction Attractive 19" stainless steel grille included 115 VAC, 50/60 Hz. motor is UL recognized, CSA certified, ball bearing type, cooled by incoming air Includes permanent filter (replacement filters available below) Comes with a 6ft STJ 3- wire cord Optional replacement filters come in a pack of five (5). TAA-compliant for GSA Schedule purchases. RoHS Compliant. Manufactured in North America.