Much like our half round steel gutters, our black square steel gutter, manufactured by Galeco, are supplied in 3m lengths. These lengths, along the other products in this range, are lightweight which allows for a simple installation process that can be completed by one person if required.This system has a 35 year guarantee and the top quality Scandinavian steel it is made from gives it a life expectancy of over 50 years.This 3m length is a 125mm system, but measures 145mm across the top if the outer hook is also included and is 82mm deep.