Features Gold brass bellLarge shankChrome-plated nickel silver inner slideDrawn yellow brass outer slideRedesigned D slide assemblyConvex valve capCompact contoured shape2 dependent, offset rotorsHand-lappedMechanical linkageLacquer finish Description Product Description Yamaha's YBL-822G Xeno Series Bass Trombone is the exclusive instrument of the Boston Symphony virtuoso and was designed to meet his strict requirements. Among its many premium features, the Xeno YBL-822G includes an adjustable thumb paddle and a redesigned D slide assembly for easy removal of water.