The Tau Rectangulum planter is made from fibreglass, a composite material of glass fibre and synthetic resin, which is lightweight yet strong. The structure of the planter features a concrete finish. This planter is suitable for use both outdoors and indoors. Thanks to its frost resistant properties, the planter can remain outside during cold periods without being damaged. In addition, the planter is UV resistant, ensuring protection against discolouration and damage caused by sunlight.