High elasticity rubber material: - The elastic band is made of high quality rubber, safe and environmentally friendly, non-toxic, with high elasticity and stretchability. The 1.5mm thick rubber material is not easy to break and can be reused for a long timeWide elastic set: - The circumference of the black elastic is about 380-460mm, the width is about 10mm, and the thickness is 1.5mm. These elastic rubber bands can be pulled to the desired length. The set contains approx 40 large black elastics which are sufficient for your daily needsEasy to use: - The thick black rubber band is very easy to use and has good fixability. When binding objects, it withstands low temperatures, does not yellow and leaves no mark on the object, ensuring the safety of large objectsApplicable occasions: - You can use these sturdy elastic bands in crafts, slings, and all other daily life uses. They can also be used in offices, homes, schools and other occasions. They are an ideal choice for organizing and grouping goods