Dynalon Watch Glass Beaker Covers, PTFE
The Dynalon PTFE plastic watch glass is molded from virgin PTFE and has a machine finish to give a smooth surface for ease of cleaning and to eliminate contamination. PTFE plastic watch glass is virtually immune to chemical attack, only attacked by some fluorine containing compounds at high temperature and molten alkalis metals. Working temperature range is from cryogenic to 260°C. Watch glasses are ideal for use as a beaker cover as well.