The Bauer 4mm Vertexx Replacement Cowling features a 4mm Tuuk Super Stainless Steel runner as well as the popular VERTEXX cutout. Because of the VERTEXX cutout and the taller support position, goalies can appreciate a 28% increased attack angle when compared to a standard goal cowling. This means that goalies can take a deeper stance, and keep the blade on the ice longer when pushing laterally, before the cowling "bottoms out" on the ice. The runner on the Vertexx cowling can be easily replaced by simply loosening the screw at the toe of the blade. The Bauer cowling are sold in pairs with the steel attached.