20 Pcs Not Graduated Plastic Test Tube Lab Test Tool with Plastic Test Tube Stand Bracket Rack for 12-13MM Test Tubes 50 Hole Positions
- 2 set Scientific Instruments:1 x Test Tube Rack & 20 x plastic test tubes
- Plastic test tubes for laboratory tests
- Round bottom with screw top on the top
- Perfect for samples, food colors, craft use etc. These were designed for use as
