20pc Extra Large High Temp Silicone Rubber Plug Kit Powder Coating Custom Paint Supplies 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.