1.73-in L x 1-in W x 1-in D Pole Clip (4-Pack) at Lowes.com
Closetmaid Part # 978 - Closetmaid 0.63 In. White Plastic Heavy-Duty Shelf Bracket For Wire Shelving - Shelving Hardware - Home Depot Pro
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ClosetMaid Concrete Wall Clip - Metal - White - U Shape - Wire Shelving Installation 7561500 | RONA