The Spring Hand Grip Finger Strength Exercise Equipment is made from environmentally friendly ABS plastic, diamond spring, and sponge. It is brand new, high quality, and compact with dimensions of 13 x 9.5 cm (with a 1-2 cm error due to manual measurement). Suitable for all genders, it is perfect for the elderly, office workers, and sports enthusiasts. Its unique design is firm, durable, and doesn't occupy much space, making it a simple and practical tool for improving hand strength and overall health.