The KIMAX-35 No. 4 Glass Bottle with Pyrex No. 29 Ground Glass Stopper is a high-quality reagent bottle designed for use in biological laboratories. Made by reputable brands Kimax and Pyrex, this United States-made bottle features a durable glass construction with a secure stopper to prevent spills and contamination. With a unit quantity of 1, this bottle is perfect for storing and dispensing various reagents and solutions in a controlled laboratory environment.