These items are commonly utilized sealing components, generally circular in shape, manufactured from a flexible material. They are designed to fit snugly into a two-inch diameter opening, preventing the passage of liquids or gases. A typical point of purchase for these items is a large home improvement retailer.
Their importance stems from their ability to create a reliable barrier in plumbing systems, drainage pipes, and various industrial applications. Historically, simpler stoppers made of wood or cork were used for similar purposes, but the introduction of synthetic rubber provided a more durable and chemically resistant solution. This has led to more effective sealing and leakage prevention, contributing to increased efficiency and reduced waste.