Glas-Col Hemispherical Mantles Series O Glas-Col Silicone-Impregnated Glass Fabric Exterior

Glas-Col Hemispherical Mantles Series O Glas-Col Silicone-Impregnated Glass Fabric Exterior. The bottom half of the mantle or neck is left uncovered forming a funnel shape and this is superior to any heating or protecting oven which must conform to a flask exactly or it is not providing an effective seal. The neck ring of the mantle is sealed by a heat-sleeve which prevents heat from escaping at either end and allows access to control the heat by radiation if required. This construction provide