Perkin Elmer, Tekmar 20 23 x 75.5 100 27.70 12961231 - Headspace vial, crimp, clear glass, flat bottom, graduated, with marking spot Perkin Elmer, Tekmar 20 23 x 75.5 100 29.62 12971231 - Headspace vial, DIN-crimp, clear glass, long neck, flat bottom