EXTRA-FIRM FOAM! Three-wedge assortment is a versatile complement for your movement education and gymnastic programs. Use them as tumbling or hurdling aids, vaulting boards, protective cushions, or obstacle course structures. Constructed with extra-firm, molded, high-compression polyurethane foam, encased in 18-oz. vinyl-coated nylon covers. Includes 20'' (W6022), 30'' (W6033) and 40''L (W6043) wedges.