I bought the Eldoncard Blood Typing Kit because I was not able to get in touch with my children's pediatrician, being that he retired and is no longer practicing. I could not find any blood type in my childrens medical records. Therefore I bought the Eldoncard Blood Typing Kit. The product was everything it said it would be. I was able to tell the blood types of my children in a matter of minutes, plus I was able to laminate the cards and keep them in a file. Great Product.