The Series M mantle is the most compact mantle with an aluminum shell that can heat flasks up to 72 liters. Like the Series TM, this mantle has a durable aluminum housing outside and resilient glass fabric inside to support flasks and protect flask walls from thermal strain. Only the bottom of the flask is covered so the contents being heated are fully visible. The mantle is grounded through the aluminum housing and requires a support as listed below. Unit comes with detachable 4-ft., 3-wire cord and locking connector. Supplied without controller.