Manufacturer: Hygenic Corporation Thera-Band Hand Exercisers, X-Large, Black, Extra Firm are specially designed therapeutic tools aimed at strengthening hand and forearm muscles. Ideal for rehabilitation, injury prevention, or general fitness, these hand exercisers are perfect for users looking to enhance grip strength and dexterity. Features: -The black color indicates that these hand exercisers provide extra firm resistance, making them suitable for advanced users or those recovering from injuries who require a higher level of challenge in their strength training. -Made from high-quality, non-toxic rubber, Thera-Band hand exercisers are designed to withstand regular use without losing their shape or effectiveness. Lightweight and compact, these hand exercisers can easily fit into a gym bag or purse, allowing for on-the-go workouts. -These hand exercisers can be used for a variety of applications, including hand rehabilitation, improving grip strength, enhancing fine motor skills, and building overall upper body strength. Perfect for athletes, musicians, or anyone looking to improve their hand function.