If you're looking for a reliable way to seal bottles, look no further than these 12-Pack Solid Rubber Stoppers in Size #4. Perfect for lab use or home experiments, these black rubber stoppers fit snugly into various openings, preventing spills and contamination. Made from durable materials, you can count on them to keep your samples secure and protected over time.
What’s great about this set is that you get twelve stoppers, so you'll always have extras on hand for your projects or whenever a last-minute experiment pops up. Whether you need them for test tubes, flasks, or beakers, these solid rubber stoppers are easy to clean and maintain. Plus, they’re designed to provide a leak-proof seal, making your lab work a whole lot easier!
