Springs Metal spring, 10cm, M10X1 VK/10 Metal spring, 12cm, M10X1 VK/12 Metal spring, 15cm, M10X1 VK/15 Metal spring, 10cm, M10X1 VK/MS3 Metal spring, 15cm, M10X1 VK/MS8 Metal spring, 12cm, M10X1 VK/MS9 Metal spring, 15cm, M10X1 VK/MS12