Shop › Small Bore Tenor Trombone Mouthpiece (490-510) Small Bore Tenor Trombone Mouthpiece (490-510) $85.00 Mouthpieces for small bore and alto trombone Rim Size: Select Rim Size 490 495 500 505 510 Cup Depth: Select Cup Depth α α+ A A+ B B+ C C+ D Throat and Backbore: Select Throat and Backbore R R+ S S+ T Quantity: Add to Cart Added! Mouthpieces for small bore and alto trombone plating $25.00 Add To Cart