Rheumatoid Factor Positive Plasma consists of defibrinated human plasma positive for Rheumatoid Factor (over 250 IU/mL) This product is readily available in volumes ranging from a few mL to tens of Liters Titer is assigned with the RF Latex method All units have tested negative for infectious agents This product can be used as molecular tool for various in vitro research and biochemical applications For in vitro research use only