Limited-Volume 2.0 mL, 9 mm Screw-Thread Polypropylene Vials. Restek. Fit all 2.0 mL, 2 x 32 mm, vial-based autosamplers. Compatible with all 9 mm screw-thread caps. PTFE-free—ideal for PFAS analysis (e.g., EPA 537) and other PFAS-sensitive methods. Related Products: 2 Ml Autosampler Vials. Certified 0.22 um ptfe syringe filter Millex-Voa Vial