The SRAM Aero SL-500 shift levers deliver high performance at a lower price. The shifting blades are made of lightweight alloy and have an optimized ergonomic shape for comfort and natural handling. Rear shifting is indexed for fast and precise gear changes, while the front shifter is designed for YAW™ chainrings.Specifications for SL-500 Aero Shifter Set 10spWeight : 154g,Speeds : 10,Compatibility : SRAM RED, SRAM Force, SRAM Rival, SRAM Apex,Recommended Group : SRAM Rival,Material : Aluminum Shifter Blade.