The Shimano SIS Outer Caps ensure your braking and shifting systems operate at their best. As genuine Shimano parts, they are designed to integrate seamlessly, offering long-lasting reliability and optimal safety. Durable Steel Construction: Crafted from high-strength steel, these outer caps provide excellent durability. They are built to withstand repeated use and the rigors of daily cycling while maintaining consistent performance. Corrosion Resistance: By sealing the ends of brake housings, the caps reduce the risk of corrosion and fraying. This protective function helps extend the lifespan of both your cables and housing, keeping them running smoothly. Smooth Performance: These caps ensure clean housing ends, preventing contamination and maintaining precise cable movement. This results in smoother, more responsive shifting and braking across all riding conditions. The 6mm caps are compatible with both shift and brake housings, making them a practical choice for a wide range of bikes. Their precise fit ensures optimal functionality and professional finish.