The TEKTRO reservoir cap is an essential accessory for hydraulic disc brakes, specifically designed for the HD-M390 and HD-T390 models. This cap ensures a secure seal of the brake fluid reservoir, contributing to the optimal functionality of the braking system. Made from high-quality plastic, it offers a durable and reliable solution for those who value safety and performance. The black color harmoniously blends into the overall look of the bike, providing an appealing aesthetic. With this reservoir cap, you can ensure that your brakes are always in perfect condition and that braking performance remains at the highest level. A simple and effective accessory that makes brake maintenance easier and extends their lifespan.