22166901 ARTSIGN 75 P MRC FSR 25 mm Mounting surround for ARTSIGN 75 P MRC (recessed ceiling) escape sign luminaires. Mounting with edge facing upwards so that the ARTSIGN can be installed in ceiling thicknesses from 1 to 12 mm. Mounting with edge facing downwards: as edge protection from plasterboard or fibreboard with a thickness of approx. 25 mm ceiling thickness. Galvanised sheet steel, fixed on rear by gluing or screws, cut-out dimensions: 180±2 x 49±1 mm, dimensions: 260 x 70 x 25 mm, weight: 0.12 kg