Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U7 (Pack of 10)

50-Place Test tube rack for 15/18mm diam. Tubes, detachable, plastic, Color is CLEAR. Test tube rack is manufactured to hold 50 tubes having an outside diameter ranging from 15 - 18mm. Great to hold tubes for parties, lip balm kits, essential oil preparation, etc.

• 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