Uxcell 20mm to 26mm w Hole Rubber Tapered Plug for Lab Home Black 5 Pack

What is this?
The Rubber Tapered Plug is great for laboratory utensils such as flasks, test tubes, or other laboratory applications.

Are there any advantages of the product?
Made of silicone rubber, good resistance to chemicals, can withstand high temperatures in a short time.
There is a hole in the center of the plug for inserting a glass tube, very convenient for meeting your needs.

How to use it?
Conical design, solid, easy to install and good sealing performance, flexible and durable, not easy to crack, shrink, harden or break.

What should I notice?
Please check the size carefully before ordering! This product has a smell, please place it in a ventilated place before use to reduce the smell.