Nov 26, 2021 · Ec21 0.22 um ptfe syringe filter for wholesales Economical borosilicate gc headspace vials with flat Vial 0.5 Ml at 20ml headspace vials online Wide-opening 2 ml,12 x 32 mm vial Superior 33 expansion borosilie glass Meets extremely tight tolerances I-D vial with write-on patch measures 0.5,1.0 and 1.5 ml 1230W33 Convenience Kit