Add curb appeal, create a container garden, or decorate seasonally with this Railing Flower Box Kit Two top-mounted Brackets for 2 x 6 Railings hold our Medium Nantucket Blue Flower Box planter Wrought iron Railing Brackets measure 9 3/4-in W (at top) x 5-in H, and are finished with Black powder coating for maximum weather resistance Medium Nantucket Blue Flower Box measures 24-in L x 7 1/2-in H, made of galvanized steel with a Blue patina finish Simple installation, place brackets at desired distance apart and secure with stainless steel screws provided and place the planter within