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Osma StormLine is a high capacity domestic system with ogee profile - suitable for a maximum roof area of 254m² (with one downpipe). Use with RoundLine or SquareLine downpipe. Connects StormLine gutter to 61mm square or 68mm round downpipe c/w right hand side blanked off Concealed sockets to hide cut ends High front edge to stop rainwater overspill Downpipe restraint - valuable for the needs of taller buildings Conforms to BS EN 607:2004 Range available in Black and White