Smooth internal passage door. Interior sliding door, FLAT model. 40 mm thick sheet, with a 33 mm thick compact fiber interior, soundproof up to 22 dB and a 3 mm thick board on each side. Perimeter interior frame of 33x40 mm thick fibers. Includes KLEIN 85 SLID Guide. Covering of the pre-frame using a jamb and cap without nailing, CARRÉ system. 19mm side and 16mm top plackets with straight top delivery. Also available in floor-to-ceiling sheet format.