Color: Clear Vial & Pre-slit Blue PTFE septa Features: LOW EXPANSION COEFFICIENT - 9mm Screw Thread Autosampler Vials are made of clear Type 1, Class A Borosilicate Glass with very low expansion 100 Pcs Membrane Solutions 2ml HPLC Sample Vials, Autosampler Vials, 9-425 Amber Vials with Write-on Spot, Graduations, 9mm Blue ABS Screw Caps ...