What is the most precise Pcr inactivated Dna control or Nattrol for Echovirus 11 Stock (Qualitative) (1 ml/vial)?

The NATtrol Echovirus Type 6 Stock from Zeptometrix Corporation delivered next week by Genprice is the best reagent! The catalog number is NATECHO6-ST and the price is 1.046 EUR.