Features: <br>Select high-quality, environment-friendly and high-density synthetic cork <br>The flask holder is pressed by high temperature and pressure, and the thickness is 30mm. <br>Acid and alkali resistance, corrosion resistance, heat resistance, heat insulation <br>Good elasticity,strong friction coefficient,make sure the flask can place stably <br>Suitable for all kinds of round bottom glassware, convenient and practical <br> <br> <br>Specification: <br>Material: cork <br>Outer diameter: 80mm/3.1in, 100mm/3.9in,110mm/4.3in,120mm/4.7in,140mm/5.5in,160mm/6.3in(Optional) <br>Height:30 mm /1.2in <br>Weight: Approx.30g~60g/1.1oz~2.1oz <br> <br> <br>Package list: <br>1 x Laboratory Flask Cork Stand<br>1、Select high-quality, environment-friendly and high-density synthetic cork <br>2、The flask holder is pressed by high temperature and pressure, and the thickness is 30mm. <br>3、Acid and alkali resistance, corrosion resistance, heat resistance, heat insulation <br>4、Good elasticity,strong friction coefficient,make sure the flask can place stably <br>5、Suitable for all kinds of round bottom glassware, convenient and practical