Chrome-plated feature increases its surface hardness (above HR65) and heat resistant? (up to 930沈/500⊥) Durable, corrosion resistant, acid resistant, rust proof and sturdy constructed Available in 5 different diameters: 60mm, 80mm, 100mm, 120mm, and 140mm to securely hold various sizes of separatory funnels and other instruments, an ideal choice to satisfy your needs Commonly used for chemical reactions, filtrations, and experiments in laboratories, factories, schools, hospitals, researches, and so on [Warranty] StonyLab ensures high quality products and premium customer service. If received damaged, please contact us immediately. We will solve it until satisfied