Inner slide The chrome-plated nickel-silver, drawn, inner slide is very durable and has a quick, sensitive response. Outer slide The one-piece, drawn, yellow brass outer slide maintains an accurate diameter throughout its length, and this type of construction ensures airtightness, smooth action, exceptional durability, and offers improved response and resonance to the sound. Inner slide stockings 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. Tubular braces Long-lasting nickel-silver tubular braces contribute to the stability of the slide and enhance smooth slide action. Balancer The balancer found on the YSL-447G perfectly proportions the instrument's weight. Upgraded bell materials A gold brass bell provides rich sound and flexible response usually reserved for professional models. Pressure-formed tubing Perfectly rounded tubing resuslts in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance. Laser-fused pluzuma welded bell A high-energy laser fuses the brass together for a virtually seamless bell which allows continuous even vibrations. Slide lock The unique slide lock design on all Yamaha trombones keeps the slide locked in place and keeps it from accidentally falling. Weight distribution Players are more comfortable playing the YSL-447G trombone because its superb weight distribution makes it easier to hold. | 
