Roxtec GH transit Transit with flange for casting or bolting. The Roxtec GH is a cable and pipe seal for casting in concrete or bolting onto even structures like steel or sandwich walls/floors. The rectangular steel frame allows for high cable and pipe packing density. The transit can be used with a GE extension frame in galvanized steel to cover the depth of a thick wall. Gas-tight Watertight Dust-tight Rodent resistant Easy to maintain and inspect Provides built-in spare capacity