Test tube Stand

Test tube rack Test tube racks hold the normal sized test tubes. It keeps the tube in an upright position. They are one of the essential tools in a chemistry or biology lab. They are available in various colors like red, blue, green, black and transparent. These can be made of various materials like wood, metal or plastic. They are generally rectangular in shape and can hold 10, 12, 20 or even more number of test tubes. The usual diameter is of about 25 to 32 mm. These stands are durable, heat and chemical resistant. They can be cleaned, washed and are crushproof.