New and innovative Gutter-Flo mesh prevents blocked gutters without restricting the flow rate in the gutter. Extensive testing was carried out to ensure that Gutter-Flo does not restrict the flow rate; one of the only products on the market to achieve this. Many are not aware that gutters have to meet a British Standard for flow rate. Gutter-Flo's unique clip design allows for easy fitting to most types of guttering and for variations in the tile position. The mesh is strong but flexible and is UV protected.