An NSI exclusive product, 300mg/L NIST traceable GGA packaged as a sterile solution in single use Teflon tubes. Pack of 25 tubes.  Stable for 3 years at room temperature. Pre-measured, to use, simply snip open the tube and pour contents directly into 300mL BOD bottle.  No measurements required and no contamination possible. Using a Snip is a Snap!