Neck finish allows the use of Poly Crimp™ Seals or standard aluminum seals. The crimp top vials are designed to work in Aijiren and other autosamplers. Type I borosilicate glass; Clear vials; Neck finish: 11mm; Dimensions: 12mm Dia. x 32mm Hgt. Seals/caps sold separately; Sold in full cases of 1000 only