Package contents: 300 pieces 38 x 1.4 mm, 100 pieces 25 x 1.4 mm, 100 pieces 50 x 1.4 mm, 3 sizes with a total of 500 pieces rubber rings, sufficient for daily use. Stretchy: The household rubber bands are made of rubber with good elasticity and strong tensile strength. They are not easily broken after repeated stretching, resist aging, and can be reused. Item Classification: The rubber bands come in 4 colors: red, yellow, blue, and green. The colors are bright and easy to identify, making them suitable for categorizing, sorting, and organizing items. Creative DIY: These colorful rubber rings can be used to make bouncy balls, braided bracelets, and other fun crafts. Encourage creativity with various DIY projects. Wide application: These rubber bands are commonly used in households, offices, schools, and more. They can be used for bundling pens, organizing vegetables, securing files, managing cables, sealing food, and other everyday tasks.