Sizes T1-T3 are availible in both small and large shank. Sizes 4-6 only availible in large shank. The "S" models have a larger Symphonic throat and backbore. All trombone mouthpieces come in the standard heavy blank. Lightweight blank availible upon request. Gold plated mouthpieces take roughly 2 weeks for delivery if not in stock. For specs see "more information".