Use for increasing ROM, eye/hand coordination, manipulation, endurance and sequencing. Base is 21¾"L x 14½"W x 1½"D (55 x 37 x 4 cm). Includes six plastic rods: 3-18"H (46cm) and 3-13"H (33cm). Rod diameters vary from ¼" (6.4mm) to 1" (2.5cm). Also includes 12 rings for each plastic rod. Disassembles and packs into the covered base for storage.