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12 mm Red PTFE/Silicone Seal ST (100/pk)
Brand: Chromatography Research Supplies Inc12 mm red with a layer of PTFE/white silicone seals, total thickness 1.5 mm, for 13-425 thread screw caps. Packaged: 4 in. x 6 in. plastic bag; Weight: 25.5 g.
