The Gutter Mate Can Be Easily Installed On Either Round Or Square Plastic Downpipes. The Water Passes Through A Filter Within The Guttermate Which Stops Leaves And Debris And Can Be Easily Inspected And Cleaned.winners Of The Hertfordshire Green Award 2011, Fsb Green Footprint For 2013 And Uk Green Apple Award For 2012 Gutter Mate Filter Is Approved By The Water Technology List Allowing The Gutter Mate To Be Used In The Code For Sustainable Homes.gutter Mate Filter Stops Debris Clogging Downpipeseasy To Install,round Downpipe - Fits 68mm To 80mmsquare Downpipe - Fits 65mm Square To 75mm Squarefilter Can Be Easily Inspectedsupplied Hose Is 0.5m Long X 20mm Diametereasy To Clean - Takes 30 Secondswater Can Be Diverted To A Water Buttprotects Soakawaysaward Winning Designapproved By Water Technology Listplease See Installation Instructions For More Details