SHIMANO Acera SL-M310 Rapid Fire Shifter, Right (Black, 7-Speed) Right-side Acera SL-M310 Rapid Fire Shifter with cables and housing Compatible with most mountain/hybrid bikes with flat handle bars Rapid-fire dedicated up and down-shift levers; indexed speed indicator Rear shifter for 7-speed (rear) cassette setup Ergonomic design; two-year warranty