- Highest elasticity and fatigue resistance. - The elastic packs are marked according to size and strength with symbols. Every type can therefore be quickly identified. Strength: - Strength ratings are based on the elastic being stretched 3 times the listed inner diameter. - Pulling force medium 1.3 N (128 g). - Material latex. - Color natural. - Inner ø 4.8 mm / 3/16 inch. **For further product information, please contact Chat Support**