Our green flexible ducting is used for ducting cable television and telecommunications services as well as CCTV installations. It is available in a coil diameter of 63mm. This measurement refers to the outside diameter (O.D.), the inside diameter (I.D.) is 50mm. Full coil 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 of the water main during installation.This coil comes with an integral coupler and a pre-installed draw cord. The coupler enables two coils to be connected together as required.The length of this coil is 50m.