The elegant antique cream PVC finials add the perfect touch to any window;Diameter of the all metal rod is .75 In and easily adjusts telescopically to fit windows; available in sizes 28-48, 48-86 and 66-120;The set comes complete with matching, all metal hardware for wall or ceiling mount; brackets can be adjusted to extend between 3.5 To 4;Tools required for installation: screwdriver and drill