Uxcell Rubber Thread Tapered Insert Plug M4 Test Tubes Bungs Stopper Black for Lab Home 25 Pieces

What is this?
The Rubber Tapered Plug is great for laboratory utensils such as flasks, test tubes, or other laboratory applications, also can as a sewer plug, water pipe plug, or drain plug.

Are there any advantages of the product?
Made of Rubber, with good resistance to chemicals, acid and alkali resistance, can withstand high temperatures in a short time.

How to use it?
Conical design, 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 put it in a ventilated place before use to reduce this smell