CSH introduces InvisiDoor, a production-hidden door sized to fit openings for a 36" door with simple installation using a pivot hinge. The door can be hinged left or right, as an inswing or outswing, and is made with premium plywood and domestic hardwoods, says the company. Design includes one fixed shelf and three adjustable shelves. Unfinished, they are ready to be stained or painted. Cherry, maple and red oak are standard.