SHIMANO ST-EF500 Shifter Set 3X7 3X8 Speed V-Brake Lever Fit ST-EF51 Bike MTB
3x7 Speed Shifter Set（3 Speed Left Shifter+7 Speed Right Shifter）. 3x8 Speed Shifter Set（3 Speed Left Shifter+8 Speed Right Shifter）. 3 Speed only- Left Shifter. 7 Speed only- Right Shifter. 8 Speed only- Right Shifter.