Description Our solid silicone stoppers, ranging from 16 mm to 20 mm, are crafted from food-grade silicone. These tapered stoppers are for laboratory and home use, ensuring a secure fit for various test tubes. The solid design prevents any liquid leakage, maintaining the integrity of your experiments and solutions. Features -Color:White -Material:Silicone -Size:2.50X2.00X2.00cm/0.98X0.79X0.79in -Silicone Stopper: Crafted from silicone, these stoppers have safety and dependability for both lab and home environments -Solid Test Tube Stopper: Designed to fit test tubes with diameters between 16 mm and 20 mm, they offer flexibility for a range of experimental needs -Tapered Stopper: The solid construction ensures no liquid leakage, maintaining the precision and reliability of your scientific work -Silicone Test Tube Stopper: With a tapered design, these stoppers are easy to insert and remove, streamlining your laboratory procedures -Solid Silicone Stopper: Supplied in ample quantities, they are for meeting the everyday requirements of any busy laboratoryPackage list: 20 x laboratory test tube stopper