The Campagnolo Hose Screw Master Cylinder + 2 O-Rings kit (EC-EK107) is a set of essential components designed to maintain the optimal performance of your braking system. This kit includes 5 sets of hose screws, master cylinder screws, and 2 O-rings per set, providing the necessary components for secure and efficient brake line connections. Ideal for Campagnolo braking systems, this high-quality kit ensures a tight seal and reliable operation.