The ASI 7403-B Spare Roll Toilet Paper Holder allows you to keep two rolls of toilet tissue in bathroom compartments where limited wall space prevents the use of standard double roll dispensers. The unit's frame and recessed box are crafted from type-304 stainless steel with a brightly polished finish. A high impact-resistant ABS plastic roller supported by chrome-plated zamak posts holds one roll of toilet paper up to 5-1/8 inches in diameter, while a second roll is kept behind the roller in the recessed box. The roller is spring loaded for easy replenishing and designed so that it turns freely, despite the presence of the second roll behind it. For installation, the toilet paper holder requires a rough opening that measures 5-1/2 inches in width by 5-1/2 inches in height and is 4 inches deep. The posts extend 2-3/16 inches from the wall once the unit is in place inside of the opening.