Specially designed to permit a full range of motion when exercising lower extremities. Graded resistance for inversion, eversion, dorsi-flexion and plantar-flexion is made possible with the addition of 1" diameter weights (not included). See p. 68 for Disc Weights. Sturdy aluminum construction with cast-iron base. Measures: 21"H x 25"W x 20"L (53 x 64 x 51 cm).