The Series M mantle is the most compact mantle with an aluminum shell that can heat flasks up to 72 liters. It 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. Withstands internal operating temperature of 450°C. Separable 4-ft., 3-wire cord and locking connector. Mantle grounded through housing.