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WAT011592Polystyrene Standard 530
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WAT011626Polystyrene Standard 6,200,000
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WAT011598Polystyrene Standard 6,400
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WAT011614Polystyrene Standard 780,000
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WAT011628Polystyrene Standard 8,400,000
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WAT011594Polystyrene Standard 950
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WAT011588Polystyrene Standards Kit, Low - Mid MW
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WAT011610Polystyrene Standards Kit, Mid-High MW
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WAT027049Porapak N 100 - 120 mesh, 29 g
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WAT027047Porapak N 50 - 80 mesh, 29 g
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WAT027048Porapak N 80 - 100 mesh, 29 g
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WAT027055Porapak P 100 - 120 mesh, 20 g