Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U1 (Pack of 50) Pumteck Details: Helps reduce moisture loss

Details: Helps reduce moisture loss while drawing and absorbing moisture from the air

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then start the complete washing cycle

just to replace them when they get degraded

Wish you enjoy with our products

Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U1 (Pack of 50) Pumteck Details: Helps reduce moisture loss50 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