Our green flexible ducting is used for ducting cable television and telecommunications services as well as CCTV installations. It is available in coil diameters of 63mm and 110mm. These measurements refer to the outside diameters (O.D.), all dimensions can be found in the table alongside the product image.The ribbed external wall ensures that the duct can withstand high compressive forces whilst the smooth inner bore resists any snagging during installation.The coupler enables two coils to be connected together as required.The length of this coil is 50m.Flexible ducting has two main advantages over rigid duct lengths. As flexi duct is available in relatively long lengths (the standard coil length is 50m), this minimises or eliminates the need for joiners, with duct often being cut to the exact size required.The main advantage of flexible ducting though is the innate maneuvrability flexibility of the product. This enables any small obstacles to be avoided or required changes of direction to be achieved without the need for additional fittings, saving cost and time.If you are using flexible duct on your own property, we would always recommend attaching aandnbsp;drawcord to your cable or pipe when you first install the service. This will enable you to easily install additional services at any point in the future if required.