GERSTEL-FLEX-Twister® for Stir Bar Sorptive Extraction (SBSE) with Polydimethylsiloxan-Sorbens (PDMS), film thickness 1.0 mm, 10 mm lenght 1 packet (100 units) (GERSTEL-Twister®s are only sold to customers with a GERSTEL-Thermo Desorption System TDS 2 Ple

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