Vertical Ring TreeVertical Ring Tree Use vertical ring tree to increase ROM, eye hand coordination, manipulation, endurance and sequencing. Base: measures 21 3 4" x 14 1 2" x 1 1 2" deep. Set includes 6 plastic rods: 3 are 18" high and 3 are 13" high. The diameters of rods vary between 1 4" and 1". Set includes 12 rings for each rod. Additional ring set for vertical ring tree includes 72 additional rings for the vertical ring tree. These consist of 12 for each vertical