Shimano Altus ST-EF51 3x7 Speed Shifter MTB Bike Brake Lever Combo with Inner Shift Cables Left 3 speed shifter comes with the barrel adjuster, right 7 speed shifter no barrel adjuster, the standard design like this Compatible with 21 speed, front 3 speed and rear 7 speed cassettes/freewheels and triple cranks Ergonomic shift/brake lever combination, trigger type handle, make it easier for variable speed operation Easy to install, compatible with V-brake systems, comes with inner cable installed & 2pcs end caps (no housing) Quick Delivery; Excellent Quality Products; Superb Customers Care; Warranty: 24 Months