See EMS-Core Sampling Tools (top) for possible replacement of Harris Uni-Cores.
The Harris Uni-Core™ is a disposable multi-purpose sampling tool for soft substrates. They are made from polypropylene, including a hollow body with built-in tool steel razor sharp cutting tip, with a plunger for the expelling of the punched sample. Uni-Core comes individually wrapped and sterilized by ethylene oxide. Uni-Core can also be reusable by rinsing the tip with ethanol after each use and autoclaving for 20 minutes at 250°F/15 psi.