Lot of two Glass Cuvette ground joint one stopper

Description

I am not sure what material it is. Has s-50 marking on them. Most likely quartz. Has ground joint. Use No. 10 stopper. One has stopper. The other missing stopper. Cylinder outer dimension about 7/8 dia x 2 length.
Can separate individually. Just message me and I can make a new listing. Feel free to ask for more details.
Check out my other listings for a good selection of other lab glassware.