CanDo Jumbo Round Foam Roller is great for positioning, balance, postural and muscle re-education, spinal stabilization, body awareness and coordination, ranging and strengthening activities. Offer progressive exercise sequences, user can move from an easier (smaller diameter) to a more difficult (larger diameter) roller. Can be used alone or with other exercisers like bands and weights. Product Specifications•Great for positioning, balance, postural and muscle re-education, spinal stabilization, body awareness and coordination, ranging and strengthening activities.•Offer progressive exercise sequences, user can move from an easier (smaller diameter) to a more difficult (larger diameter) roller. •PLEASE ADVISE: Special item 2-4 weeks deliverySize and Quantity•Roller 8"x 12".•Each.