Sample vials with screw cap, PP, 7mL, sterile - ProSciTech Buy 7, 20% off (automatically applied at check-out) each Screw Top 15mm Clear Glass 12mL Sample Vials - Pack of 200 Cap Type, Screw Top. Cap Size, 15mm. Vial Size. Cap Thread Size, 15-425. Color, Clear / Transparent. Material, Borosilicate Glass. Working Volume (mL), 12mL.