Borosilicate glass dropping funnels with PTFE stopcocks and open tops, ideal for basic extractions.

• Cylindrical ungraduated glass dropping funnel
• Made of durable, high quality borosilicate 3.3 glass which withstands high temperatures and thermal shocks
• Open top for easily adding liquids
• Fitted with a PTFE key stopcock
• Used for extractions or to dispense liquids into a system slowly (drop-wise)

Autoclavable, with superior chemical durability. Low temperature gradient - can withstand high temperatures and thermal shocks.

Eisco Labs borosilicate glass has the following heat tolerances:
- Strain point 515 °C
- Annealing point 565 °C
- Softening point 820 °C