Feature: 1. Hand exerciser grip, a must tool to all music players, also suitable for finger strength exercise in daily life. 2. Safely and conveniently build strength, endurance, flexibility and coordination. 3. Provides a complete strength training solution for fingers, hands, wrists, and forearms. 4. Allows you to adjust individual finger tension from light to heavy, providing all-in-one hand fitness for musicians. 5. Using silicone material, soft design, comfortable pressing, will not hurt your fingers. Durable, longer using time. Specification: Aroma hand exerciser AHF-03 is the ultimate all-in-one hand, wrist and forearm fitness tool. Features: Hand exerciser grip, a must tool to all music players, also suitable for finger strength exercise in daily life. Safely and conveniently build strength, endurance, flexibility and coordination. Provides a complete strength training solution for fingers, hands, wrists, and forearms. Allows you to adjust individual finger tension from light to heavy, providing all-in-one hand fitness for musicians. Using silicone material, soft design, comfortable pressing, will not hurt your fingers. Durable, longer using time. Specifications: Color: Yellow, Blue, Green, Black(optional) Brand name: Aroma Tension range: 4Lb - 7Lb Product size: 8.7 * 6.8 * 2.1cm / 3.4 * 2.7 * 0.8in Product weight: Approx. 74g / 2.6oz Package size: 18 * 12 * 3.5cm / 7 * 4.7 * 1.4in Package weight:Approx. 95g / 3.4oz Package List: 1 * Hand Exerciser Package List: 1 * Hand Exerciser