The chrome-plated nickel-silver, drawn inner slide is very durable and has a quick, sensitive response. The one-piece, drawn, nickel silver outer slide maintains an accurate diameter throughout its length and this type of construction ensures, airtightness, smooth action, exceptional durability, and adds resonance to the sound. Specially designed one-piece inner slide stockings guarantee airtight slide construction, and offer smoother slide action and better alignment, even in the extended 6th and 7th positions. Long-lasting nickel-silver tubular braces contribute to the stability of the slide and enhance smooth slide action. Pressure-formed tubing results in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance. A high-energy laser fuses the brass together for a virtually seamless bell which allows continuous even vibrations. The unique slide lock design on all Yamaha trombones keeps the slide locked in place and keeps it from accidentally falling. The large, easy-to-hold, nickel-silver bracing guards against possible slide damage if the instrument is dropped and also lessens fatigue while playing. Yamaha trombones have mouthpipes featuring special acoustic designs allowing for precise intonation and greater blowing control. The dual bore of the YSL-356G makes the transition from a Bb to a Bb/F model easier for students.