PTFE key stopcock offers superior chemical resistance and low therma.

• Class A and Class B versions available
• Made from high quality 3.3 borosilicate glass
• Straight single bore
• Blue enamel graduations for contrast against clear liquids

These burettes are made of precisely-bore, high quality, heavy duty borosilicate 3.3 glass with excellent durability and chemical resistance. Both Class A and Class B versions conform with DIN ISO 385 standards for accuracy. The attached PTFE key stopcock has high chemical, moisture, heat and UV resistance. Calibrated to deliver.