Heavy duty wood shelf brackets, sold in pairs ---KL1513 – Ablelin Store Fixtures Corp.
Builder'S Hardware 13"x20" Heavy Duty Black Shelf Bracket | Home Hardware
Everbilt 20-inch Heavy Duty Bracket in White | The Home Depot Canada
Shelf Bracket for 24 in. Wire Shelf – Allspace Home Organizing Solutions
Folding Shelf Brackets 20 Inch Heavy Duty Stainless Steel Collapsible Wall Mounted Shelf for DIY Bracket,Folding Bench,Work Table, Space Saving Max Load 400lb 2pcs with Screws : Amazon.ca: Tools & Home Improvement