Copper Guttering Large Half Round External Corner 90 Degree Description Our Half Round style copper gutter is manufactured from 100% natural 0.6mm copper and is supplied in 2.4m lengths, making both transportation and installation uncomplicated. This simple design has a folded back edge for strength and an attractive rolled front for decoration. Fitting our Half Round copper guttering couldn't be easier, sections are overlapped jointed using silicone and rivets, with pre-made corners and outlets available off the shelf. Standard profile measures: 70h x 125w Large profile measures: 95h x 185w