The Primo THD-70 thermal box with a diameter of 60 mm eliminates the need for time-consuming plastering as with conventional flush-mounted boxes. The THD-70 thermal box is installed quickly and easily in just a few seconds using the specially developed thermal foam. The SCS connection technology allows several thermal boxes to be lined up and firmly connected - ideal for quick wiring or the installation of pre-wired devices. To ensure that the box can be found quickly after plastering, we recommend the universal plaster cover to protect the inside of the box. The THDS-70-S2 thermal box set is ideal for those new to thermal boxes. Alternatively, a THDS-70-S1 thermal box set is also available.