The Zinc Gutta branch pipe is designed with a radial ridge in order to evenly spread the load within the gutter which reduces the wear and tear on your system. This component has been manufactured to be compatible with the majority of drainage designs, used to significantly reduce the risk of blockages. To ensure your branch pipe is meeting the needs of your system, this product is also designed with a plugged hole that can be used for inspection to ensure it is performing correctly. Manufactured in resilient 0.7mm zinc, this product is tough, durable and lightweight for easy installation. Zinc Gutta Downpipe Branch Dimensions Diameter: 80mm