In order to evenly heat different round bottom glassware vessels, such as flasks, without significantly raising the risk of glass shattering, Heating Mantles Digital is utilized. The body of these heating mantles is rolled aluminum. The flexible, insulated heating element is firmly fastened to the glass cloth. The heating element temperature can reach 350. The external probes temperature is precisely controlled by a PID microprocessor controller. includes a support rod, a clamp, and an external temperature probe.