WHD UP-10 T6, 8 cm-wide band ceiling speaker system, 6/8 W, 150-20.000 Hz, RAL 9016 white, with 6W/100V transformer, incl. mounting material for ceiling thicknesses 1 to 20 mm, impregnated membrane, Comments: light weight, tool free mounting through clamps, dimensions: outside dia. 140mm, mounting depth 72mm, cutout 120mm, weight 1,1kg