Lab Glass Color Comparison Tube colorimetric Cylinder with Stopper 25ml a Set of 12 New
- 1:Color comparison tubes are used for visually comparing solution sample colors..
- 2:Matched set of 12 tubes for consistent graduated-ring scale..
- Shadowless bottom transmits undistorted light.
- no dark spots form when tube is filled with liquid and viewed from the top using a light source beaneath the tube.