✔ Select high-quality, environment-friendly and high-density synthetic cork. Featured with acid and alkali resistance, heat resistance, heat insulation. 

✔ 6 Different sizes of cork flask stands, providing excellent support to 30ml - 2000ml round bottom flasks. 

✔ Designed to prevent damage to your flask or other spherical bottom containers. 

✔ Used in various laboratories, chemistry classrooms, hospital，chemical plant, home, lab.