Specifications: Material: Aluminum & Plastics Compatible with most mountain/hybrid bikes with flat handle bars (Diametmer: 22.2mm) Suitable for MTB / city car / recreational vehicle / road car / folding bike Color: Black Type: 1 pair(Left +Right Shifter) Mount: left (3 Speed) / right (8 Speed) Size: L 6.2 x W 4.7 x H 4.5 inches 1cm=0.39Inches Features: - Right shifter is a trigger-type 8 speed shifter,with one lever for down-shifts and a thumb button for up-shifts. - Left shifter is a friction / ratcheting thumb lever for triple cranksets. - For 8 speed indexed SIS shifting. Optical gear display for convenient verification of gear position - It works perfectly for optimum performance and maximum safety and longevity. Package Included: 1 pair ShifterNote: - Please allow minor errors due to manual measurement. Thanks for your understanding. - Monitors are not calibrated same,item colour displayed in photos may be showing slightly different from the real object. Please take the real one as standard.