The Team Clip-On offers a range of position options in a lightweight package Extensions are double-butted aluminum with domed ends Carbon fiber armrest plates cut weight and provide a stiff platform, and they have six different positions to help you get the perfect position Armrest risers are included for adjustment in the vertical axis Not compatible with bar end shifters 31.8mm 230mm J-Bend Black Bead Blast Aero Bars Alloy