12mm rise, 31.8mm Diameter, Chrome. ProTaper Carbon bars feature PFL (Plastic Foam Lamination) manufacturing. PFL utilizes tiny particles and steam pressure in the lamination process to expand and shape the structure of the bars. The process uses less excess resin and fewer plys, resulting in a 15% lighter bar. and Textured “Grit Grip” finish in clamp areas eliminates over tightening of components.