Forespar Performance Products Emergency Plug Sta-Plug. A soft cone shaped design allows it to easily fill the irregular shapes of hull impact breaches as well as any round hole leak from a hose or through-hull. Unique edge gripping riblets help hold the plug in a hole keeping water out. The riblets help Sta-Plug conform to the shape of the hole sealing a leak near the edge where a tight fit is crucial and holding the plug more securely in place. Different by design Sta-Plugs shape includes a series of concentrically larger riblets stepped along the length of the cone. These riblets offer two big advantages over traditional straight edged emergency plugs:They help Sta-Plug conform to the hole near the edge where a tight fit is most crucial They help hold it more securely in place Twist and compress by hand to insert into hole Expands after insertion to hold in placeIntended for temporary emergency use with continuous monitoring only it gives the skipper greater peace-of-mind to allow them to focus on getting the boat to safety.Made from high density foam Sta-Plug will remain soft and ready to go for years and will not mold or swell up like conventional wood plugs.Can be cut with a knife to use in irregular shaped holes or torn by hand near the riblets to make smaller diameter plugs for smaller holes Tearing at the 8th riblet creates a plug with a 2 diameter base Made from high density foam that is not susceptible to mold or swelling Bright orange color allows it to be quickly located in an emergency Dimensions: 9 High x 5 Diameter at base Not for Fuel Leaks Specifications for Forespar Performance Products Sta-Plug Emergency Plug: Manufacturer: Forespar Performance Products Color: Black Package Contents: Forespar Performance Products Sta-Plug Emergency Plug Forespar Performance Products 150110: Emergency Plug Sta-Plug