Description This test tube plug is used to seal equipment in chemical experiments, such as pharmaceutical, chemical, mechanical, and scientific research industry. Perfect for demanding sealing applications, industrial, labs uses. Also used for heavy-duty equipment isolation applications. Features - Color:Random Color. - Material:Plastic.- Size:1.20X1.20X1.20cm/0.47X0.47X0.47inch.- The test tube plug is made of good quality material, which is durable and practical for the long time use.- The set includes 100pcs, enough quantity, can greatly meet your practical needs.- Features the good elasticity, which will not do damage to the bottle or test tube.- Comes with a variety of colors, which can distinguish the different products.- Suitable for medicine, chemical industry, scientific research test tube use. Packing list: 100 x test tube plugs