Free sample screw laboratory vials with screw caps for HPLC system Vial 4ml at Aijiren Aijiren Sample Vials,4mL or 0.14oz,Aer,13-425 Finish with 14B Rubber Liner,Type I Borosilie Glass (4 mL E-C Vial,Glass Aer,13-425 Rubber Lined Cap)4 mL Economy Vial,Glass Aer,13-425 Cap,Rubber.