Volts: 480v Phases: 3 18.0kw Heat Tunnel Aperture: 6 Inches Wide X 9 Inches Tall Stainless Steel Construction Can Shrink Neck or Sleeve Is Capable of Handling 4-1/2″ Diameter Necks and up to 7″ High Bans or Sleeves with (4) Top Mounted Recirculating Blower Motors with Adjustable Airflow Control Panel has Temperature Controller Heat, Down / Up, Manual / Automatic, On / Off Switches and is Mounted on a Stainless Steel Base Frame