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![Biotechne - Protein Simple , Knob Knurled 1.5"D 1/4-20x3/, S-31-12161-00](/shop/_ui/responsive/theme-lambda/images/NoImageIcon.jpg "Biotechne - Protein Simple , Knob Knurled 1.5"D 1/4-20x3/, S-31-12161-00")