The Rinnai Symmetry Granite Outer Frame kit is sent as four separate pieces so as to minimise damage during transit. It can be assembled by a skilled handyperson, or you can use a tradesperson, such as a tiler to install.
Installation is a staged process requiring adhesive to cure overnight—process will take three days. This timeframe will need to be factored, especially if you are paying a tradesperson to complete the work.
During installation it is advisable to have an extra pair of hands to assist. The length and weight of the granite pieces as well as the quick bonding adhesive can be tricky to work with.