100 Pcs Membrane Solutions 2ml HPLC Sample Vials, Autosampler Vials, 9-425 Amber Vials with Write-on Spot, Graduations, 9mm Blue ABS Screw Caps & Septa for GC Sample vials. Visit the Membrane Solutions Store. 4.6 out of 5 stars. 65 ratings. | 13 answered questions.