Description. LOW EXPANSION COEFFICIENT - 9mm Screw Thread Autosampler Vials are made of clear Type 1, Class A Borosilicate Glass with very low expansion coefficient. It shows excellent chemical resistance to acidic and neutral solutions, due to its relatively low alkaline content even to alkaline solutions. ATANDARD UNIVERSAL VIALS - Our HPLC sample vials is 12mm Diameter, 32mm Height, compatible with aijiren (1042, 1050, 1080, 1082, 1084, 1090, , , , , , , 7672,