Features 【Experiment with more peace of mind】: Upgrade your experimental accessories and choose this flask holder to ensure that the round-bottomed container is stable and does not roll, allowing the flask to stand firmly and upright, thus maximizing safety and protecting your experimental process. 【High-Quality Material】: Our flask holder is made of top-grade cork material, which provides excellent flexibility and thermal insulation, as well as excellent electrical insulation properties, corrosion resistance, waterproof and flame retardant, providing quality assurance for your experiments. 【Exquisite design】: Adopting a unique particle surface design, this flask holder improves friction and ensures that the container can be firmly fixed even in slippery conditions, reducing the risk of accidents during the experiment. 【Size Adaptation】: Our flask racks are precision-made, and the size of the equipment is designed to fully consider the needs of the laboratory and take into account the experimental needs of different specifications. 【Widely Applicable】: This flask holder is suitable for a variety of occasions, including university laboratories, research institutions, medical and health units, chemical production lines and home DIY scientific experiments. It is an ideal choice for scientific research and education accessories. Specification: Material: cork Outer diameter: 80mm/3.1in, 100mm/3.9in,110mm/4.3in,120mm/4.7in,140mm/5.5in,160mm/6.3in (Optional) Height:30 mm /1.2in Weight: Approx.30g~60g/1.1oz~2.1oz Package list: 1 x Laboratory Flask Cork Stand Package List