This Glas-Col® Series O mantle is similar to CG-10007 except mantle is slit lengthwise to a 1 ½” hole in the bottom center with lacing closure to accommodate a cylindrical reaction vessel, CG-1924, with a bottom drain. Mantle is glass fabric, 115 volts, and is supplied with a separable 4 foot, 2 wire extension cord with locking connector for each circuit. The 10,000mL size has two circuits at the listed wattage.