USE Aero Extensions are compatible with the vast majority of handlebars on the market. Outside diameter is 22.2mm and are available in 20°, 30°, 40°, and 50° bends in the Ski-Bend design. Available in both alloy and carbon weave finishes.
If you have a high hand position then the 40° and 50° options are available in a Hi-Rise option where the shifter cable holes are at the correct end. Available in a carbon weave finish only.