Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U2 (Pack of 1)

Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U2 (Pack of 1)

50 hole,Diameter: 18.7mm/0.74" These are great for making homemade chapsticks, storing ink samples, test tubes, lip balm, great for holding small cylinders upright Suitable for test tubes with an OD ranging from 15mm to 18mm The test tube rack are made of laboratory grade polystyrene, durable and light weight, easy to carry, not autoclavable The test tube has 3 Layer, 2 slots, each layer has a direction, slide the shelves in from one side, the other side has a lip that stops it, fits very snug. The stand has three layers of holes with a smallest hole at the bottom to keep tubes steady, and the large holes on the second and the top floor