1 pc Shaker Twister Arm Trainer. Material: iron core tube + fine steel spring + NBR foam. Adjustable strength: 30kg. My friend. Our products are all within the United States（USA）. with warehouses in the East and West of the USA.
The Shaker Twister Arm Trainer is ideal for home gyms seeking an effective and adjustable chest expander to boost upper-body strength and conditioning.
