Description _x000D_ _x000D_Suffered from different sizes of funnel and flask caps? You need our adapters. Different size can be fit for different diameters. You can use a single one or nest adjacent sizes together to fulfill your task. Also it helps reduce the risks from insertion and removal of glass stems via these rubber cones. _x000D_ _x000D_ Features _x000D_ _x000D_- Color: Green _x000D_- Material: Rubber _x000D_- Size: About8.30X8.30X3.30cm/3.26X3.26X1.30inch _x000D_- It is made of rubber material, is flexible and can be used for a long term. _x000D_- Easy to wash and use even from oil with warm water and add little soap. _x000D_- Different diameters, suitable for different sizes of experimental apparatus. _x000D_- Can reduce the risks associated with insertion and removal of glass stems through these rubber stoppers. _x000D_- It has reasonable design, simple operation method, and saves time and effort. _x000D_Packing list8 x Funnel Adapters