50 Piece 3/16" X 11/32" High Temp Silicone Rubber Tapered Plug Kit Powder Coating Custom Painting Supplies Bottom diameter: .1875" - Top diameter: .345" - Length: .625" 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.