Key of Bb, bell front, .512" bore, 10" yellow brass bell, rose brass lead pipe, stainless steel pistons with plastic valve guides, nickel silver tuning slide, concave finger buttons. Size 12 small shank mouthpiece. Includes: polishing cloth, pair of white marching gloves and Ravel lightweight case with backpack straps. Ravel marching brass instruments are the most durable instruments around. Made from brass that will hold up through countless marching seasons, these instruments project extremely well and have many step-up features. These instruments are a great buy for a school band program or an individual looking to have their own marching instrument.