Description: 3x9 speed: 3-speed can only use the left shifter, 9-speed can only use the right shifter, 3x9 speed can only use the left and right shifters. Optical gear indicator: All gears are linked with noise-reducing stops to provide precise and consistent transmission performance. Optical gear indicator is designed to show the gear for you. Trigger handle: The right shifter is a 9-speed trigger with a downshift lever and a thumb button for upshifting. The left shifter is the trigger lever for the triple set. Ergonomic design: Compatible with cable, brackets, rollers and mechanical disc brakes, ergonomic design makes operation more comfortable. Premium material: This thumb shifter is made of durable aluminum alloy material, perfect for maximum performance and maximum safety and longevity. Brand: SHIMANO Model: EF65 Speed: Left 3 speed / Right 9 speed Material: aluminum alloy Black color Comes with inner gear cable Package includes: 1 pair of bicycle shifters