Puritan 25-83004 PD NB Puritan ESK Sampling Kit - 4ml Neutralizing Buffer, Polyester, TubePuritan 25 83004 PD NB Puritan ESK Sampling Kit 4ml Neutralizing Buffer, Polyester, Tube Sterile Environment Sampling Kit Pre Filled with 4ml Neutralizing Buffer Packaging: 50 individually wrapped systems = 50 cs Intended for the detection of microorganisms found on dairy and food equipment disinfected with chlorine or quaternary ammonium compounds Easy edge peel packaging Quick turn leak resistant cap High quality Puritan polyester tipped swab Swab