Test tube stand, This autoclavable stand is perhaps the most commonly used test tube stand in various laboratories. For better visibility, this 6 place rack is end supported by 2 columns. The top plate has 2 holes for holding 25 mm dia test tubes, four holes to hold 16 mm dia tubes where as the base has corresponding hemispherical wells. It also has six vertical pins for drying tubes. Another option available in this section is a test tube stand in which all the holes in the top plates can hold 25 mm dia tubes.