Description: - ?Premium and Reliable?: The chest expander is made of high quality steel material, which is high tensile strength, Eco friendly, sturdy, and durable. - ?Compact and Handy?: Lightweight, simple structure is easy to be taken to the office, gym, camping or traveling, doing exercise anywhere. - ?Upper Body Exercise Equipment?: Spring power twister bar can train arms, chest, shoulders, back, and your whole upper body. - ?Ergonomically Design?: Nonslip handle provides you with a more comfortable grip, and keeps you prevent your hand from falling off the chest exerciser, giving you maximum resistance throughout the exercise. - ?Suitable People?: Upper body exercise is suitable for young, adults, beginners, exercisers, and trainers. Specification: - Material: Steel Size Chart: 20kg: Entire Length: 50.5cm 19.88inch, Spring Diameter: 0.5cm 0.20inch, Handle Length: 8.2cm 3.23inch, Spring Length: 23cm 9.06inch 30kg: Entire Length: 55.5cm 21.85inch, Spring Diameter: 0.58cm 0.23inch, Handle Length: 9.8cm 3.86inch, Spring Length: 23cm 9.06inch 40kg: Entire Length: 55.5cm 21.85inch, Spring Diameter: 0.62cm 0.24inch, Handle Length: 9.8cm 3.86inch, Spring Length: 25cm 9.84inch Package Includes: 1 Spring Power Twister Bar Note: Please allow slightly errors due to manual measurement and different monitors.?Premium and Reliable?: The chest expander is made of high quality steel material, which is high tensile strength, Eco friendly, sturdy, and durable. ?Ergonomically Design?: Nonslip handle provides you with a more comfortable grip, and keeps you prevent your hand from falling off the chest exerciser, giving you maximum resistance throughout the exercise. ?Upper Body Exercise Equipment?: Spring power twister bar can train arms, chest, shoulders, back, and your whole upper body. ?Suitable People?: Upper body exercise is suitable for young, adults, beginners, exercisers, and trainers. ?Compact and Handy?: Lightweight, simple structure is easy to be taken to the office, gym, camping or traveling, doing exercise anywhere.