Seals for VWR® 11 mm Standard Opening Crimp-Top Vials . When separating organic and inorganic compounds for analysis, chromatography vial closures protect compound mixtures from contamination. Certified Vials, Caps, Septa, and Inserts at Competitive Prices. advanced technology for HPLC, GC, Crimp-top Verex™ vials use cost-effective aluminum crimp seals. 12 x 32 mm, 11 mm Crimp-Top Vials and Closures. VWR® 11 mm Standard Opening Crimp-Top Vials