Glas-Col Mantle Extension Support for 5000mL Series O Mantle, 11 1/8in ID. This lattice mount support holds spherical and hemispherical Glas-Col Series O mantles up to 5-liter capacity. The steel support, with its fabric strap basket, is strong, handy and durable. Attaches easily to stable ring stands or distillation racks. Supports are painted gray. This mantle support is made from 1/2in diameter rod.