RL11 tapered corks are medium to large natural cork stoppers made from 100% sustainably harvested cork, designed to seal medium to large openings with a secure, reliable fit. The tapered profile is wider at the top, narrowing toward the base and allows a single stopper to accommodate a range of opening sizes, including containers with nonuniform openings where a straight-sided plug would fail to seal reliably. Natural cork compresses slightly on insertion, creating a snug seal without adhesives or tools, and its inherent flexibility means it conforms to minor variations in the opening. Whether referred to as end plugs, masking plugs, or hole fillers, these stoppers deliver dependable performance across every use. Each RL11 tapered cork measures 27mm at the top diameter, 21mm at the bottom diameter, and 31.8mm in length. Perfect for sealing glass and ceramic jars, bottles, medium to large containers, larger test tubes, laboratory vessels, construction holes, masking applications, craft projects, science applications, and any industrial or commercial use requiring a reliable, natural plug.

Why Choose RL11 Tapered Cork Stoppers?

• 100% natural cork construction provides a compressible, self-sealing fit without adhesives or hardware
• Tapered design fits a range of opening sizes — including nonuniform openings where straight-sided plugs won't seat correctly
• Naturally sustainable and biodegradable, making them the environmentally responsible choice over synthetic rubber or plastic plugs
• Suitable for food-contact, laboratory, and industrial environments where a clean, inert seal is required
• Available in bags of 70 for small-scale or craft use, or cartons of 4,000 for commercial and industrial volume
• Consistent sizing across the RL range makes it easy to step up or down to adjacent sizes as needed

RL11 tapered corks outperform synthetic rubber and plastic plugs by combining natural compressibility with sustainable sourcing for a seal that's reliable, clean, and kind to the environment.