Wide selection of vials, including HPLC Certified vials (tested by HPLC for cleanliness) and LCMS Certified vials (tested for total ion count and presence of clusters in the high mass range). These are the cleanest vials in the industry. Maximize your lab efficiency with fewer failed assays and limited instrument downtime caused by vials out of specification. You can choose from Waters broad range of vials, each one is held to tight dimensional tolerances and the certified products have cleanliness measured by LC and MS.