All PROTOCOL Hematology Stains are prepared with materials certified by the Biological Stain Commission to ensure purity Manufactured with strict quality control measures to ensure lot-to-lot uniformity, including extensive analytical and performance testing on human specimens Remain stable for a minimum of 12 months when stored at room temperature Allow varied staining times to suit individual preferences Packaged in durable plastic bottles for safety and easy handling Convenient finger tabs and clear reagent identification eliminate improper line connection