yamaha ytr-2335 bb trumpet yamaha the yamaha ytr-2335 offers many of the features you would find on a professional trumpet at a student trumpet price. a professional style bell and bore size are just some of the features that make this the ideal model for beginning students. features honed pistonsthe precise fit between valve casings and pistons after honing means no air leakage. pressure-formed tubingperfectly rounded tubing results in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance. laser-fused pluzuma welded bella high-energy laser fuses the brass together for a virtually seamless bell which allows continuous even vibrations. nickel silver at stress pointsnickel silver is a very strong material, and when used at stress points, makes the instrument far more durable. delrin one-piece valve guidesdelrin one-piece valve guides are durable and quieter than metal valve guides. first valve slide thumbhook assists in intonation. specifications level standard key bb bore ml: 0.459" bell diameter 4 7/8" leadpipe gold brass body material yellow brass bell material yellow brass; pluzuma welded weight medium key buttons plastic finish baked epoxy lacquer pistons / valves nickel-plated mouthpiece 11b4 options monel pistons (ytr-2335ms)