Stopfen is a sealing plug designed to close openings quickly and securely. It helps prevent leaks, dust ingress, and contamination while allowing easy removal when needed. This product emphasizes reliable function, compatibility with common opening sizes, and durable performance in everyday use. Materials and exact sizes vary by model, so refer to the product page for specifications. Key benefits - Quick, tool free installation with a firm seal - Reduces leaks and contamination during storage, transport, and maintenance - Available in multiple sizes to fit a range of openings - Durable construction designed for repeated use Attributes to consider - Function: seals openings and blocks passage - Compatibility: fits standard opening diameters; verify size on packaging or model chart - Size: several diameter options; choose the closest fit - Material: selected for durability and suitable chemical resistance per model - Performance: maintains a reliable seal under normal handling and environmental conditions 2-3 use scenarios - Seal a container after filling to prevent leaks during transport - Cap a pipe end during maintenance to stop flow - Temporarily close a laboratory vessel during cleaning or storage