Spelsberg Universal ceiling box for installation in concrete, for ceiling slab thickness up to 4.5 cm, with M5 threaded bushing (load capacity 10 kg) to take a ceiling hook, VDE certified as per DIN EN 60670 (VDE 0606), lamp output LED max. 3 W, lamp output, halogen max. 6,5 W The use of the U86 as the luminaire installation housing in large components such as element ceilings or filigree ceilings does not comply with the accredited state-of-the-art. Basically the admissible installation tolerances there do not allow for precise installation., 2-part, with smooth face for nail and adhesive fixing