Edwards T-STDN Large Bore Slide for tenor trombone, fits for Edwards T-327 & T-350, bore size: .547", brass outer slide, nickel silver end crook, clear lacquered, incl. 3 leadpipes. This slide has a more rounded end crook similar to Conn slides. Quick in response, the T-STDN blows freely in all registers. A very centered tone can be achieved with this slide.