Midwest Fastener #4 Cork Stopper

The Midwest Fastener #4 Cork Stopper provides a secure, reliable seal for laboratory glassware, test tubes, craft projects, and general storage applications. Made from natural cork material, this tapered stopper compresses easily upon insertion to create a tight and dependable fit. Its durable cork construction offers resilient sealing performance across a wide range of DIY, organizational, and workshop uses. Designed for simple insertion and removal, this stopper delivers long-lasting utility and protection against spills and contaminants.