Introducing the Plasticoid VWR Black Rubber Stoppers, designed for versatility and reliability in laboratory settings. This case includes 5 durable one-hole stoppers, perfect for sealing flasks and test tubes while allowing for the insertion of tubes or probes. Made from high-quality rubber, these stoppers provide an airtight seal, ensuring your samples remain uncontaminated. Their robust construction withstands various chemicals, making them ideal for a range of experiments. Whether you're in a school lab or a professional research facility, these stoppers are an essential addition to your lab equipment.
