This Glas-Col® Series O mantle is used with a round bottom cylindrical reaction vessel, CG-1920 and CG-1922, featuring a Pyrex® flange. The mantle covers the bottom and sides of the vessel leaving enough room under the flange to safely remove the reaction vessel clamp while the mantle is in place. Mantle is glass fabic, 115 volts, and is supplied with a separable 4 foot, 2 wire extension cord with locking connector. The 10,000mL size has two circuits at the listed wattage.