Amazon.com: Maotong Adjustable Window Planter Box Brackets 6 Pack, Heavy Duty Wall Mount Flower Box Holder for Planter Box Depth (Front to Back) 6 to 12 Inches, Black : Patio, Lawn & Garden
Brackets for window sills, walls and railings – London Planters
Window Box Brackets
10 Brackets for Window and Flower Boxes, Wrought Iron - Etsy
Vigoro Adjustable Window Planter Box Single Metal Bracket 51472 - The Home Depot
Amazon.com: VOXOR Window Box Brackets, Adjustable Planter Box Brackets, Heavy Duty Iron Flower Box Brackets for Railings, with Enhanced Bottom Support - Perfect for Balconies, Fences, and Gardens (4 Pack) : Patio,