This balance is 24 in. It has a bow tie shaped device installed in the end of the spiral rod. The bow tie engages a balance foot that has been installed on the bottom edge of the window (vent) with a dual hook protruding out from the corner for the bow tie to engage. 24 in.
6.Size: #8 X 1-1/4 inchFlat Head, Phillips DriveDesigned to attach wood to wood or hang items onto a wood structured fixtureFeatures a sharp pointed tipDepending on the application and type of wood, a pre-drilled pilot hole is sometimes neededThread Type: Deep, Point Style: SharpSpecification(s) Met: ASME B18.1.