sample containers TOC/VOC EPA vials caps and septa Screw neck vial, N 24, 27.5 x95.0 mm, 40.0 mL, flat bottom, clear Screw neck vials N 24 (EPA) for VOC / TOC analyses. With closed top screw closures for sample storage. Most frequently Aijiren TOC/VOC EPA vials factory--glass sample vials 40mL 24-400 TOC Vial. 1.