The Mantles are single piece and are flexible knitted glass fabric to which resistance wire is attached in a coil form. The heating mantle is housed in a housing made of mild steel sheets with powder coating finish. Each mantle is fitted with Built-in Energy Regulator & pilot lamps. Designed for operation on 230 V single-phase 50 cys. A/C. Suitable for heating applications using round bottom borosilicate glassware.