Feature: These balls come in different levels, allowing you to choose the appropriate one for your needs. They can be shared with family members and friends, making it easy to invite others to join in the training. Raised design: The textured surface of the reaction balls helps provide a massaging effect on the body, aiding in muscle relaxation and fatigue relief after exercise. Durable material: Made from high-quality rubber, these massage balls are built to last and resist deformation or damage during regular use. They are safe for skin contact and will not cause discomfort when used as intended. Portable size: Compact and lightweight, the balls are easy to carry and store. They can be conveniently placed in pockets, bags, or stored in drawers when not in use. Suitable for various settings: Ideal for use in gyms, training facilities, or at home, these reaction balls are suitable for athletes, fitness enthusiasts, and individuals of all ages. Simple and versatile design: The basic appearance makes them appropriate for men, women, adults, and adolescents. Color: Pink, Blue, Green, Yellow, Red. Material: Rubber. Size: 5.5 x 5.5 x 5.5 cm. Package Contents: 5 x Reaction Training Balls. Note: The package includes only the items listed above. Lighting and display differences may cause slight variations between the color shown in the image and the actual product. Measurement may vary by up to +/- 1-3 cm.