ACHLA DESIGNS 12 in. W Black Powder Coat Iron Wall Mounted Flower Box Brackets (Pair) SFB-04 - The Home Depot
VEVOR Window Box Brackets 88lbs Planter Box Brackets 24 x 10.5 x 10 in Black Planter Mounting Bracket Iron Material Black Window Box Hanger Bracket for Flower Box Durable Window Box Holder - Walmart.com