as 24mm screw thread types for EPA vials or as 9mm short thread versions. Rack (1.1mL=2mL w. Inserts). •. Dionex. UltiMate Micro, conical, WPS-3000 SL, Micro Vials at Thomas Scientific. Micro Vials found in: Micro Vial Tray, Micro Sample Vial 2 mL, 4 mL Graduated PFA Micro Vials without Caps, Micro-Vials with Screw Threads, KIMAX Accuform..