Feature: Lab supply cork flask care. Acid-resistant, alkali-resistant, anti-corrosion, heat-resistant. Strong friction coefficient, make sure the stock is firmly placed. Flask mats, round-bottomed bottle holders. It can protect the flask, waterproof anti-corrosion. A good assistant for laboratory experiments. Cork stand only, other accessories demo in the picture are not included. Specification: Material: Stopper Outer Diameter:80mm/3.15in-for 10-150ml100mm/3.94in-for 150-250ml110mm/4.33in-for 250-500ml120mm/4.72in-for 500-1000ml140mm/5.51in-for 1000-2000ml160mm/6.30in-for 2000-5000ml flaskHeight: app.30mm/1.18inColor: BrownQuantity: 1 PcNote: No retail package. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included: 1 x Stopper Stand