Thermo Scientific™ 11mm Autosampler Inserts. Made of clear glass or polypropylene, these 11mm inserts are available in a variety of configurations with usable volumes from 250μL to 450μL. Pricing and Availability. Restek™ Polypropylene Vial Inserts. Specially designed for 2.0mL, 11mm crimp-top and 2.0mL, 9mm short-cap, screw-thread vials.