The cartridges with encapsulated Kreuzspitze springs for telemark have been designed to be durable and reliable performance, their unique design allows, through the use of special keys ’ CST by Kreuzspitze, to easily open Spring protection cartridges to replace them with a more or less soft Springs kit to customize the most of your spring response according to the specifications of the Telemarkers. The ability to open the cartridges also allows easy maintenance resulting in increasing duration ensuring maximum performance over time.