These simple but effective Timber Toppers are still around. Long before autopoles this was the simplest and preferred method to make quick partitions and seamless holders. Using any 2" x 4" plank of wood.Simply measure your distance subtract 2 inches, cut your 2" x 4" and insert into the Timber Topper. Can be used horizontally and vertically. Timber toppers only work with 2" x 4" planks, can not be thiner or thicker.