The Santoprene Durometer Mystery

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I have always known that the two-digit numbers in the Santoprene grades referred to the durometer hardness of the grades. For instance,  Santoprene 101-55 is a 55 Shore A, 101-73 is a 73 Shore A, 101-87 is an 87 Shore A etc. Sometimes its good to verify the things that you know to be true.

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