3ml per vial. Order in multiples of 5 vials.CE marked for use as an IVD Within the UK, EU member states and EEA countries. In all other territories this product can be used for research purposes only.IFU available in English,French,German Spanish only.https://www.nibsc.org/products/rrs.aspxThis reagent is compatible with the Result Reporting Software (RRS) application, use link for more details.