Unique chromatography sample vials and closures manufactured by J.G. Finneran with a twist of the cap that produces an evaporation-proof seal. 1.8mL Glass Vial Clear, with 9mm Blue Screw Cap - IndiaMART. Crimp caps vials provide the tightest seal, reducing the chance of sample evaporation. The 12x32mm crimp vials and 11mm aluminium crimp caps