The set of six LaMotte 0290 glass test tubes with screw-on caps is designed for use with the LaMotte 2020E turbidity meter and the Smart 3 Colorimeter (sold separately). The 10mL test tubes can be used for standards or water samples. The white line ensures that the test tube is correctly aligned in the meter. The set includes six glass test tubes.

LaMotte manufactures analytical reagents, portable water testing instrumentation, and microbiological testing products. The company, founded in 1919, is headquartered in Chestertown, MD.