Whirl-Pak with Sodium Thiosulfate Tablet

Designed for sampling any potable water supply. Contains a nontoxic, non-nutritive 10mg tablet of sodium thiosulfate. Puncture-proof bag closures are labeled "NASCO Thio-Bag" for easy identification. With white write-on strip. EPA approved for potable water collection and for NPDES compliance monitoring. Sterile. 25 bags/per dispenser, 4 dispensers/case.