This gutter measures 114mm across the top of the gutter and is 60mm in depth. Manufactured by UK market leader FloPlast, our Square Gutter carries the prestigious BS Kitemark and has a 10 year mechanical and colour guarantee. The flow capacity of square gutter is almost twice that of the half round system. This 3m FloPlast square gutter with a 114mm diameter is designed for domestic roof drainage. It carries rainwater efficiently from the roof to the downpipe and integrates with other square-line fittings in the system.