Comfortable under-mattress springing system that not only works wonders for your night’s sleep but also improves ventilation. Can be fitted into the tightest corners or angled bunks by cutting the individual spring elements. Kit contains: 40 normal springs, 8 soft springs, 48 cross feet and 10 bridge feet for adjusting the spring hardness. Width approx: 64 - 70cm, length approx: 200 - 220cm.