Ergonomic Design : Optimized for improved handling, our lever covers feature a shape that naturally fits your hand, reducing strain and enhancing your riding experience. Easy to Fit : Quick and hassle-free installation ensures you can enjoy the benefits of our covers without spending hours on setup. Model Specific Fit : Designed specifically for Shimano Ultegra ST-6600, ST-6603, and 105 ST-5600/5601, these covers offer a perfect fit, ensuring compatibility and functionality. Comfortable Grip : The textured surface provides a comfortable grip that minimizes hand fatigue, even during extended rides. Performance Enhancing : By improving grip and reducing vibration, our covers help you maintain peak performance, no matter the conditions. Enhance your cycling game with our ergonomic lever covers, tailored for Shimano Ultegra ST-6600, ST-6603, and 105 ST-5600/5601 models. With easy installation and a focus on comfort, they're the perfect addition to your gear, promising a more enjoyable and efficient ride every time.