silanized gc headspace vials Shimadzu 4ml Wide Opening Sample Vial for Shimadzu Technical Grade In chromatography field, screw vial has 1ml, 2ml, 4ml volume. When choosing screw vial, please choose the suit one. 4ml ND13 chormatography screw neck vial are mainly suitable for the Aijiren Tech, Shimadzu, Spark Holland, Varian, VW