40 lb. V-FORCE Black, 3-1/4" narrow shoulders) Lifetime Warranty, 30-day money-back guarantee, made in USA Short model keeps weight off stomach. Maximizes fulcrum effect - best for targeting core muscles. Two shoulder widths give you the option of a wide shoulder for walking running type of workouts, or narrow for body-weight workouts, like pull ups and push ups. Complete with all weights included.