Meco Sports Fitness Adjustable Spring Steel Exerciser Arm Pulling Resistant Band Expander

Specification: Material: Spring steel and plastic Size: 42cm x 8.5cm (Lenght x Width) Maximum Tension Length: 1M Suit For: 4-16 years old students Color: Red, Black, Blue Weight: 320g Features: Improves complete upper body strength Great for toning or building your kids chest and arms Using carbon steel tension spring and it can be disassembly,dynamics can be adjusted as you like. Package Included: 1 x Spring Exerciser