Ceiling junction box, 4 screw domes with screw spacing 60mm, with M5 threaded bushing (load capacity 10kg) to accommodate a ceiling hook, can be combined at a standard spacing of 71mm, fully insulated cable transition, suitable for all types of formwork and counter formwork, with protection class IP30, rated insulation voltage: 400V AC, halogen-free, magnet or nail fastening, membrane for perforation, sealing range M16-M25, can be used with support beamsDimensions: 71 x 71 x 79mm