Caps, Low Volume Inserts, Vials, U-2D Micro-sampling System & Vial Accessories for HPLC and GC are found in this category. Every chromatography laboratory has different requirements for sample containers, therefore, we have developed different "Tiers of Performance" to meet your specific needs. From our economical, BASIK™ tier of products, our MicroSolv™ pharmaceutical, grade brand, our AQ™, Advanced Quality, HPLC Certified tier, to our Best-in-Class, RSA™ tier with surface treated