Drill hole max. 86mm, drill with a hole saw and any reworking of the hole is forbitten. The box shall be installed to the center of the drill hole. The box has two screw towers with c/c 70mm (for M4 screws), which fits all standard ceiling covers and lamp outlets (also DCL standard). The green adapter ring supplied with the box is used with single plaster board ceiling (12.5mm), and the ring is removed with double plaster board (2 x 12.5mm). If the plaster boards are 15mm thick, a red adapter ring is also used; in one position the lift is 2.5mm (1 x 15mm plate) and in another position 5mm (2 x 15mm plate). The box has one opened inlet for a 16/20 mm tube, and totally 8 fixed inlets. The box comes with a lid AU67.70._x000D_
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Manufactured from halogen free material (IEC/61249-2-21), the box complies with the IEC/EN60670:2005 glow wire test (850 °C).