- ISO yellow standard (ISO 10243) - Extra-rigid spring - For extra-heavy loads - Trapezoidal wire - Ends squared and ground - Withstands shocks - Endures jolts - Easy to compress to solid height - Material: chromium-vanadium-coated steel Advantages - The trapezoidal wire permits optimum deflection whilst protecting against the risk of damage caused by overloading the spring. - Hardness sufficient to allow heavy loads to be withstood. - Heat resistance up to 230°C. - Uniform spring performance. - Uniform stiffness ratio - Greater load accuracy for a given height. - Reliable performance. - Reduced risk of breakage. Option - Other sizes