Features 1、Steel construction with reinforced nylon shoulder straps, maximize your bicep and triceps workouts 2、Adjustable nylon shoulder straps, custom for your body 3、Unique shape design, target at training your arm, pecs and shoulder muscle groups 4、Perfect supports your elbows, enables to keep the correct posture during curls 5、High density sponge pads on both sides of the training board, protecting the elbow and relieve the pressure of the arm Features: Steel construction with reinforced nylon shoulder straps, maximize your bicep and triceps workouts Adjustable nylon shoulder straps, custom for your body Unique shape design, target at training your arm, pecs and shoulder muscle groups Perfect supports your elbows, enables to keep the correct posture during curls High density sponge pads on both sides of the training board, protecting the elbow and relieve the pressure of the arm Specifications: Item type: biceps training board Material: aluminum Thickness: 0.3cm Color: black, pink, blue, red, yellow (optional) Package size: 580 * 130 * 105mm / 22.8 * 5.1 * 4.1in Package weight: 1050g / 2.3ounce Packing List: 1 * Training Board Package List 1 * Training Board