What is the most precise Pcr inactivated Dna control or Nattrol for Escherichia coli 0157:H7;EDL933, External Run Control, Medium (6 X 1 ml/vial)?

The NATtrol Escherichia coli from Zeptometrix delivered next day by Gentaur to your Lab is the best choice!!! The catalog number is NATECO(933)-GP and the price is 42 EUR.