Color: Amber 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 Autosampler Vials, 2mL HPLC Sample Vials, 9-425 Vial Amber Glass Bottles with Write-on Spot, Graduations, 9mm Blue ABS Screw Caps & Septa for GC Sample vials