Products 1 - 9 of 145 Reduce failed assays with Waters glass and plastic autosampler vials and high sample recovery vials - certified/tested by HPLC, GC, VIALS & CAPS - Th. Geyer Size. PK. Art. No. (1) Clear glass, round bottom. 0.3 ml. 31.5 x 5.5 mm Screw neck vials and micro-vials ND8 are used as standard in GC and HPLC.