Matching Jambs and CasingsDoorDesignLab door units are completed with jambs and casings, which are factory pre-finished to match the door slab in style and color. RUBBER SEAL Energy saving: rubber seal helps to keep the warmth inside the room for a long time due to the absence of gaps between the door leaf and the door jambBetter sound insulation qualities Protects from dust, smoke and insects Real Aluminum MoldingsModernize the look of your door with this new feature! Aluminum moldings available to give your door a unique modern lookSmart SweepAutomatic Door Sweep is optionally installed at the bottom of the door to protect the room from dust, noise, drafts, smoke and insects. Upon closing, the sweep mechanism is triggered by a switch at the door?s hinge side, which activates the sweep to drop down. Made in Italy.Solid coreWe use a technologically advanced insulating core that has a density of 12,5 lb/ft3.High density wood fiber core is mixedin with polyurethane resin and waxto yield in high level of sound and thermal insulation.