Clear Borosilicate glass vials for aluminum seal. Supplied without closures. The 8 x 30 mm size is designed for use with Perkin-Elmer, Sigma 2000 and other similar autosamplers using 60 position carousels. The 12 x 32 mm size is designed for use with Hewlett-Packard robotic arm and other autosamplers using 12 x 32 mm aluminum seal vials (K60820)