Sold in multiples of 5. 3ml per vial.IFU available in English,French,German,Spanish, Danish only.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.This reagent is compatible with the Result Reporting Software (RRS) application, use link for more detailshttps://www.nibsc.org/products/rrs.aspx