ADVENT SL-M819-R (9 SP) - Xpress Shifter. - Mountain. - Model No.: SL-M819-R. - Shifter Style: Flat Bar Xpress Trigger. - 9 Speed. - Side: Right. - Sealed Bearings: No. - Compatibility: Microshift ADVENT ONLY; NOT COMPATIBLE WITH SHIMANO! - Gear Indicator: No. - Operations: Index-Thumb. - Bracket Material: Aluminum.