• metal, nylon
• Resistance band exercise cords-- can help you effectively exercise muscles and shape a beautiful body.
• Bodybuilding arm straps-- the excellent workmanship of it will bring you a .
• Bicep muscle strength trainer-- our product could return you a wonderful body shape.
• Bicep -- you can get a comprehensive workout to build up a solid back, strong shoulders and arms.
• Bicep curl muscle -- convenient for storage and does not occupy space.