Our Half Round Cast Iron Effect guttering comes in 4m lengths - the standard length for most PVC gutters.Made by the UK market leaders FloPlast, our half round gutter system measures 112mm across the top and is 52mm deep. Despite the huge choice in gutter designs these days, Cast Effect half round is one of our most popular gutter options. With its traditional appearance, and simple yet efficient functionality this guttering is guaranteed for 20 years.Half round cast effect gutter connects to 68mm round downpipe.