These low-volume sample vials are ideal for 6mm, 7mm and 8mm autosampler trays. Choose from flat or conical base to maximize recovery needed for small-sample injections. Re-usable sleeves support the crimped, sealed vials in the correct position in autosampler carousels or in racks and allow movement of the vials as a unit to injection positions in both GC and HPLC autosamplers.