Rubber Stoppers with Hole for Test Tubes and Flasks Easy to Use in Laboratories Black 10pcs

Description:If you are looking for some test tube stoppers, then you must not miss our rubber plugs. Simple in structure, very easy to use, suitable for professional and personal use. Small size and light weight, these rubber plugs are easy to take, has good sealing effect for you to use rest assured. Features:-Color:black. -Material:Rubber -Size:2.50X2.50X2.30cm/0.98X0.98X0.90in-Size:1.70X1.70X2.30cm/0.67X0.67X0.90in-Hole diameter: 0.50cm/0.20inch.-Perfect for chemical industry, medicine and other scientific researches use, these rubber sealing stoppers fit your demands.-The rubber plugs can be used with the test tube, a necessary sealing rubber stopper for experiments.-These rubber stoppers are using a suitable taper shape design, easy to insert and pull.-Small and compact, easy to store and use, not taking up much space of home or laboratory.-Smooth and durable, these sealing stoppers for test tubes will not do damage to the bottles or test tubes in laboratory.

Perfect for chemical industry, medicine and other scientific researches use, these rubber sealing stoppers fit your demands.The rubber plugs can be used with the test tube, a necessary sealing rubber stopper for experiments.These rubber stoppers are using a suitable taper shape design, easy to insert and pull.Small and compact, easy to store and use, not taking up much space of home or laboratory.Smooth and durable, these sealing stoppers for test tubes will not do damage to the bottles or test tubes in laboratory.