Silanized glass vials are an excellent solution when protein absorption must be avoided. Assembled Caps and Septa for 15x45mm Screw Thread Vials. Thermo Scientific™ 2mL, 9mm Clear Screw Top Vial Kit, Silanized . Description, Silanized 2mL Clear Glass Vial, 9-425 Screw Thread. Septa, PTFE/Silicone, Pre-Slit, Bonded. Material, Glass. Color, Clear.