Disposable Carbon Steel Surgical Blades, Sklar, #22. Sklar's Disposable, Sterile, Carbon Steel Surgical Blade #22 is a larger version on the #10 Scalpel Blade. It has a curved cutting edge and a flat, unsharpened back edge. The #22 blade is larger than both the #20 and #21 blades. It is compatible with the #4 series and larger handles. This blade is commonly used in cardiac and thoracic procedures to make incisions in the bronchus. Disposable blades are available in bulk quantities of 100 per box.