Our high-quality rubber stoppers (size 6.5) are designed to meet the stringent requirements of various laboratory applications. These stoppers are soft, non-greasy, and provide a secure seal, making them an essential component in any lab setting. Additionally, they are perfectly compatible with 250 mL and 500 mL Erlenmeyer flasks and 500 mL flat bottom flasks, ensuring a reliable fit for your specific needs.
 
Features
 
Material: Soft, high-quality rubber
Durometer: 45 (ensuring optimal flexibility and sealing capability)
Dimensions:
Top Diameter: 34mm
Height: 25mm
Bottom Diameter: 27mm
Quantity: Approximately 20 stoppers per one-pound pack
Design: Solid (no hole drilled)
Compatibility: Fits 250 mL and 500 mL Erlenmeyer flasks and 500 mL flat bottom flasks