Snow Joe FPH1901W Adjustable Flower Box Holder, White Holds 18" to 36" (46  91 cm) flower boxes Durable finish resists rust Beautify decks, balconies, patios, porches, fences and trellises Fits up to 3.5" to 6" (8.9  15 cm) railings Available in white (MODEL FPH1901W) or black (MODEL FPH1901B)