Description
| Catalog No. | Cork Number | Bottom | Top | Height |
| (in MM) | (in MM) | (in MM) | ||
| ±.2mm | ±.2mm | ±.2mm | ||
| 19813/1 | 0 | 6 | 9 | 16 |
| 19813/2 | 0 | 8 | 10.5 | 20 |
| 19813/3 | 0 | 9 | 13 | 15.5 |
| 19813/4 | 1 | 11 | 14 | 18.5 |
| 19813/5 | 2 | 13 | 16.5 | 20 |
| 19813/6 | 3 | 14 | 19 | 21 |
| 19813/7 | 4 | 15 | 21 | 22 |
| 19813/8 | 5 | 17.5 | 22.5 | 23 |
| 19813/9 | 6 | 20 | 24.5 | 24 |
| 19813/10 | 7 | 20 | 26 | 27.5 |
| 19813/11 | 8 | 21 | 26.5 | 27.5 |
| 19813/12 | 9 | 21.5 | 28 | 31 |
| 19813/13 | 10 | 26 | 30 | 33 |
| 19813/14 | 11 | 29 | 33 | 32 |
| 19813/15 | 12 | 30 | 34.5 | 34.5 |
| 19813/16 | 13 | 31 | 38.5 | 37 |
| 19813/17 | 14 | 32 | 41.5 | 45.5 |
| 19813/18 | 15 | 38 | 42 | 40.5 |
| 19813/19 | 16 | 35 | 45 | 36.5 |
| 19813/20 | 17 | 40 | 49.5 | 40.5 |
| 19813/21 | 18 | 48 | 53.5 | 33.5 |
| 19813/22 | 19 | 44 | 58 | 45 |
| 19813/23 | 20 | 51 | 60 | 56.5 |
| 19813/24 | 22 | 50 | 65 | 41 |
| 19813/25 | 23 | 59 | 72 | 42 |
Natural Rubber Solid Corks are high-quality sealing stoppers designed for laboratory glassware and general scientific use. Made from durable natural rubber, they create a secure, leak-free closure for tubes, flasks, and containers. Their temperature-resistant and chemically stable design ensures reliability in routine lab procedures and specialized industrial workflows.
Key Features
- Premium natural rubber construction for excellent elasticity and sealing strength
- Temperature resistance from –40°C to +130°C for versatile lab use
- Smooth, tapered design ensures a tight, uniform fit in standard glassware
- High mechanical durability—resistant to cracking, drying, and deformation
- Non-reactive with common laboratory reagents
- Available in multiple sizes for universal compatibility
- Ideal for long-term storage, transport, and controlled experiments
Material Specifications
- Material: High-grade natural rubber
- Thermal Properties: Stable sealing performance from –40°C to 130°C
- Chemical Properties: Resistant to dilute acids, bases, and common solvents
- Mechanical Properties: Excellent flexibility, compression strength, and tear resistance
- Standards: Manufactured according to general laboratory rubberware guidelines (ISO / DIN compliant)
Technical Specifications
- Length: 28 mm
- Base Diameter: 21 mm
- Top Diameter: 24 mm
- Tolerance: Standard molded rubberware tolerance for consistent fit
- Sizes: Available in multiple stopper numbers (various diameters and lengths)
- Accessories: None required; compatible with standard laboratory glassware
Handling & Precautions
- Store in a cool, dry environment away from direct sunlight
- Clean with mild detergent; avoid strong organic solvents
- Do not expose to flames or high-temperature sterilization beyond 130°C
- Avoid prolonged contact with oils or oxidizing chemicals
- Replace if signs of hardening, deformation, or surface cracks appear
- Ensure proper sizing to achieve secure and safe sealing
Applications
- General laboratory sealing of flasks, test tubes, and sample containers
- Chemical, biological, and pharmaceutical laboratories
- Academic and research institutions for routine experiments
- QC/QA laboratories for controlled sample storage
- Industrial testing labs requiring reliable closures
- Ideal for color-coded workflows, storage stability, and leak prevention
