This mantle can accomodate and efficiently heat all types of straight walled metal beakers by preventing contact of heating elements and vessel walls with inner layers of glass fabric. Also available for glass beakers with resilient and pliable interior glass fabric which cradles fragile beakers. Heat is concentrated at the bottom of these mantles so even small liquid volumes may be heated. All 115 volt units are CSA certified. With separable 4 ft., 2-wire cord and locking connector.