aijiren Tech hplc vial caps in amber for aijiren autosampler hplc vials and caps in amber for liquid autosampler with high quality Sigma aijiren Tech™ 8mm Amber Glass Crimp Top Vials - aijiren Tech Sci 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