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Pictured SAMSOL Samson Die spring Die spring Die spring load red in spring appearance marked sizes and load, thoughtful design, allowing you to more quickly identify and classify. Die spring marked-up text read:? 40-90 outer diameter of 40mm - 90mm i 28.8 free long deformation of 28.8mm (with 300,000 times the standard) 320kg load of 320kgs (30 million times as a standard) production batch number unique??? Method three-song quality and stability with a unique patented spring "wiring works fine organization" manufacturing, Yu material length without deformation and surface damage of the excellent performance SAMSOL die springs made of SAE 9254, with high stress, high-speed amplitude and heat resistance other characteristics of good labeling specifications convenient selection SAMSOL die spring is the only spring side marked global product specification information brands, you can quickly choose a color-coded identification and classification easy difference in different colors load series, easy to identify and classify