Demo Schilke Greenhoe GB41G Professional Tenor Trombone -Standard Features -One-piece Bell -LT bell weight -8.5” bell diameter -.547” bore size -Yellow brass main tuning slide -Greenhoe valve w/ yellow brass tubing -Standard valve cap -Yellow brass handslide -Nickel silver handslide crook -2 Interchangeable leadpipes in yellow brass The GB4-1G features a lightweight gold brass bell that provides unparalleled flexibility in timbre while still maintaining excellent projection and a quick, clear response. The Greenhoe GB4 series features a design based on the finest mid-to-late 20th century orchestral large bore tenor trombones. The GB4’s one-piece bell offers a broad sound and excellent projection with minimal effort. Subtleties and nuances abound with Greenhoe’s improvements to the classic design.