Gutter balloons are designed to prevent leaves, twigs, and debris getting into downpipes and causing blockages. This product is engineered to fit securely into downpipe outlets. The product is compatible with two common downpipe sizes: 65mm square and 68mm round. Made from polypropylene, this innovative product is designed to be flexible and fit into most gutters using a simple push-fit application. The Gutter Balloon Leaf Guard cuts down on messy maintenance keeping downpipes clear, making it an ideal addition to most rainwater systems.