This elbow assembly, down, 90°, (incorporating the duct break-out component), is used to provide a safe exit for optical fibre cords to equipment, at any point in a 100, 220 or 300mm duct system. It allows optical fibre cords to feed vertically down to a rack. The elbow clips straight into a cut out, 1 cut wide x 75mm deep, made by the cut out tool (Part No: TC1279-231KIT) or cut out jig (Part No: TC1279-483A). The cut down is made to the top of the ducts, highest, longitudinal rib. This 100 x 100mm duct, elbow, 90°, down can accept any standard 100 x 100mm duct item, using a standard or slotless joiner. It can also accept an end cap (Part No: TC1279-456), that allows one large dia convoluted tube to be connected to it. The tube is Ø75mm ID/Ø88mm OD mm (Part No: TC1279-458). With a prepared square end, the tube screws into the mating outlet port. The 90°, down break out has a snap-fit, removable cover (Part No: TC1279-453). Accessories/other items available separately.