This replacement kit contains one complete ATOP closure unit, including a pre-installed, ready-to-use 45 cm cable. Optimized for Swings Jr. boot sizes EU 37–42, this cable length ensures an ideal fit and efficient power transmission for growing skaters. Whether mounted on the left or right side, the one-piece system allows for easy replacement, restoring the snug, micro-adjustable fit crucial for performance and comfort. Built to meet the demands of active junior skaters, this system supports reliable closure, long-term wear, and seamless adventure readiness. One piece!