Mar 22, 2020 · Some Recommendations about Closure Selection in HPLC / GC . Part 5 Autosampler Vial Product List (Bestsellers) 1. Screw 8-425 (8mm, N8) HPLC Vial, Cap, Septa and Inserts 8-425 2mL HPLC Vial without Write-on Spot 8-425 2mL HPLC Vial with Write-On Spot Closure & Septa for 8-425 (8mm) Screw HPLC Vials Insert for 8-425 (8mm) HPLC Vials . 2.