WELLAND Twintrack Locking Shelf Brackets, 18 Inch, Single, White Package includes: 1 Locking Shelf Brackets (Without Twintrack Upright). Size: 18.5 inch length (47cm each). Weight capacity up to 150 lbs, when installed properly. Any size of Twintrack Bracket is suitable for Twintrack Upright. Brackets and Uprights sold separately. Powder-coated steel resists rusting, chipping, and cracking. Increase your storage and organization capacity efficiently in minutes.