• 2 Rubbermaid 70" Twin Track System Uprights (uprights must have 22 1/2" spacing between the screw holes) • 2 Rubbermaid 9" Twin Track System Brackets • Recommend: 1" H x 9" D x 30" L Solid Shelf Select the wall for your shelf/shelves • 2 Montants à canal double Rubbermaid de 177,8 cm (70 po) (les montants doivent etre espaces de 22 1 /2 po entre les trous de vis).