Distilling round-bottom flask coated with Ace Instatherm. Designed to operate up to 360°C, heating response time is very rapid, (5° per minute), with very low thermal lag. Has vertical standard taper reinforced outer center neck and two standard taper reinforced outer side necks. Three-prong connector plug is designed to work with Ace variable voltage output controls. 1 liter and smaller sizes have low voltage requirements.