Shimano Ultegra 6600 ST-6600 2x Double LEFT/FRONT STI Shifter
For Sale is a Shimano Ultegra 2 x 10 speed Left Shifter ( so the 2x side) (ST-6600) w/ Flightdeck. Model: Ultegra 6600. Left/front shifter only for double drivetrains. Part Type: Shifter. Shifter Style: Drop Bar.