SRAM® MRX(tm) Comp Twist Shifter - Technology: 2:1 gear ratio and SRS technology for smooth and precise shifting - Gears: 8-speed - Gear display: Quick View - Material: 50mm handle (extra soft) made of Empilon®, housing made of lightweight Grilon® with injection molding finish - Compatibility: Shimano® derailleurs - Additional features: sealed cable entry