Includes 20 plugs to fit all holes from 3/4" up to 1 7/16" Withstands heat up to 600 degrees Fahrenheit/315 Celsius. Flexible, durable, reusable and color coded. Premium quality silicone will not crack, shrink, harden or break. Use for powder coating, painting, plating, anodizing, media blasting, etc. This 20 Piece XL Silicone Plug Kit is a great fit for the powder coater, custom painter, scientist, handy man, media blaster or anyone who needs premium quality silicone tapered plugs. This kit is ideal for the bigger jobs with holes from .750" up to 1.437" ID. This superior grade of silicone is capable of withstanding temps up to 600 degrees Fahrenheit (315 Celsius) for at least 20 minutes and holds up to most chemicals. It is ultra tough yet flexible, reusable and will not crack, harden, shrink or break over time. Unlike the competitors, all of our premium silicone goods are color coded for ease of use and the color will never bleed or fade.