This adapter provides a method of aligning ducts and other components with a 45mm offset. The offset is established by alternately joining two 30 degree bends with either: a standard joiner (Part No: TC1279-27, Telstra No: 035300514) or a slotless joiner (Part No: TC1279-248A), which is included. It is often used to align a duct run that has been dropped off an existing run, i.e. the new duct is realigned from its side exit position to the old centre at a different level.