Test tube holder - Wikipedia
A test tube holder is used to hold test tubes. It is used for holding a test tube in place when the tube is hot or should not be touched. For example, a test tube holder can be used to hold a test tube while it is being heated. Moreover, when heating the tube with liquid or solid contained inside, the holder ought to tightly hold a test tube in order for the tube to be safely held while heating.
DA: 69 PA: 25 MOZ Rank: 31