Wavin Osma RoundLine is a 112mm (4½") gutter system with circular 68mm downpipe, designed for domestic standard use. It is suitable for a maximum roof area of 163m² with one downpipe. This stopend fits inside a RoundLine gutter fitting to blank off the end, ensuring a secure fit and conforming to BS EN 607:2004. The range is available in black, grey, white, and brown.