N 6576 Bottom Mirror DR Roller - Quantity 1 Bottom mount roller assembly for mirrored wardrobe doors. Used by Marshall Doors, the door rests on a tab on the bottom edge of the roller housing while being held in place by installation screws from the side and into installation holes on the roller's back sides. The adjusting screw can be accessed through a hole below. The 1-1/2 in. concave nylon ball bearing roller allows the metal framed mirrored door to roll smoothly and effortlessly. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.