Jupiter Quantum Marching F Mellophone 5050S Silver-Plated Brass Body is made from the highest quality brass and finished with a bright silver-plate ensuring fine playability and tonal brilliance Stainless Steel Pistons have remarkably smooth, fast action for improved agility and playability The Wood-Frame Case boasts a classic look that offers excellent instrument protection whether home or on the road Key of F Silver-Plated Finish