Scienceware* Metric Diameter Gauge Tubing Sizer

Handy gauge will end doubt about inside or outside diameters. This gauge measures glass and plastic tubing, connecting pieces, rods, test tubes, etc. Measures diameters between 1.5 and 16 mm. Holes on one side measure OD; pins on the other measure ID. Keep one with your tubing and one with your culture, centrifuge or test tubes. Made of polypropylene. Autoclavable.