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. Content: 30 x 100 pieces = 3000 pieces Traction force: light 0.7 N (71 g) Material: latex Color: natural Inner ø: 3.2 mm / 1/8 inch