50 Piece 1/8" X 1/4" High Temp Silicone Rubber Tapered Plug Kit Powder Coating Custom Painting Supplies Bottom diameter: .125" - Top diameter: .250" - Length: .750" 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.