5 Pc 1 5/16" X 1 5/8" #8 High Temp Silicone Rubber Tapered Plug Powder Coating Custom Painting Supplies Bottom diameter: 1.312" - Top diameter: 1.625" - Length: 1.00" Flexible, durable and reusable. Withstands heat up to 600 degrees Fahrenheit/315 Celsius. Use for powder coating, painting, plating, anodizing, media blasting, etc. Premium quality silicone will not crack, shrink, harden or break.