Sterile polyethylene bags are designed for sampling any potable water supply. Each bag includes nontoxic, non-nutritive tablets containing 10mg of active sodium thiosulfate. The 100mL size bag for single test use includes one tablet and features 4oz. and 100mL indication lines. The 300mL bag includes three tablets and is suitable for multiple tests. Puncture-proof tab bag closures are labeled “NASCO Thio-Bag” for easy identification. White write-on strip accepts pen, pencil, and felt-tip marker.

Supplied in packs of 100.