About the product
- 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
