Belgrave Rubber Bands Size 31- 500 grams The Belgrave range of rubber bands come in different sizes and offers various uses including: Securing important documents and loose items together, sealing bags, wrapping items for better grip, etc. The seamless construction make it easy to work with - just roll into place. For a better grip, wrap the rubber band on the item twice. Made of 75% Premium quality natural rubber, these rubber bands are perfect for securing items around the home, classroom and workspace.