Product Review
The United Scientific RSTPK2 Rubber Stopper Assortment is a 1lb. bag of solid rubber stoppers in sizes 00 to 7. The stoppers are solid (no holes) and are tapered to fit compatible labware, bottles, flasks, test tubes, and other containers.
United Scientific Supplies manufactures laboratory supplies and science education products. The company, founded in 1992, is headquartered in Waukegan, IL.
