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I found that all of my springs look the same and there is no length difference like the ones in your picture. I dropped them once and mixed them up and had no idea which one was which. The only way I could tell was to put them into my gun and shoot a few bb's over a chrono. Then I put them back in the proper packages. You might be able to tell which spring is which by squeezing and feeling for the hardest spring but this could be hit or miss. Hope this helps.
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