Popular kit if you test every two weeks. Economy spore strip test does not include a control strip. This kit comes with 26 spore strips for your autoclave. Kit includes an instruction sheet, report forms, return envelopes, return postage, and spore strips. When you test your sterilizer, return the strip to our laboratory in the self-addressed stamped envelope provided. We will complete testing on your spore strip and send you a report and certificate for your wall.