The tubes are molded from premium grade polystyrene or polypropylene. Polystyrene offers clarity, and polypropylene offers impact strength and stability against common acids, alkalies, and solvents. Polyethylene (PE) flanged plug caps provide exceptional leak-resistance. They feature two flexible flanges that press firmly against the inside wall of the tubes, thereby providing better leak-resistance than standard plug caps.
- Polystyrene (PS) tubes can withstand 1500 RPM
- Polypropylene (PP) tubes can withstand 3000 RPM
- PP is autoclavable & freezable