Crimp top vials also have a large opening finish (6.0mm) and are (thicker Crimp Neck) 2.0mL, Clear vials, with PTFE/red rubber cap, unassembled. With Our Simplified Selection of Chromatography Vials - Restek. Fit all 2.0 mL, 12 x 32 mm, crimp-top vial-based autosamplers. PTFE/Red Rubber ...