This White Rain Diverter Kit collects rainwater from your roof for garden use or other outdoor tasks. It prevents water butts from overflowing by diverting excess water back into the downpipe. The kit fits standard 68mm round or 65mm square plastic downpipes. Simply cut a section from your downpipe and insert the diverter. The kit includes a 470mm hose, all necessary connectors and washers, and fitting instructions. Specifications: Length (mm) - 480, Width (mm) - 370, Connecting hose diameter/bore - 20 mm. Not suitable for cast iron downpipes. Some water butts may require drilling for attachment.