13mm Autosampler Inserts aijiren Tech™. aijiren Tech™ National 13mm Autosampler Vial Inserts are made of clear Type 1 Class A borosilicate glass and available in two configurations for use with HPLC or GC autosamplers. Usable volumes range from 350μL to 850μL. [Bullet] Conical inserts offer a low residual volume of less than 8μL.