Advanced materials: This trainer is made of silicone, featuring good elasticity, safety, environmental protection, and durability. It's the perfect product for everyone! 6-level resistance: The silicone guitar finger trainer fitness equipment offers 6 levels of resistance, including 6.6 lb, 8.8 lb, 11 lb, 13 lb, 17 lb, and 21 lb. You can choose the appropriate level based on your grip strength. Lightweight and portable: Our finger trainer is small and lightweight, weighing only 80g. It can be easily placed in pockets and bags, making it easy to carry and space-saving. Multifunctional: This grip strength training device can be used not only as a recreational exercise device, but also as a stress-relieving tool and can also be used as a rehabilitation training device. It can be used in a variety of situations. Wide range of uses. Perfect gift: The hand enhancer kit is ideal for increasing the strength and flexibility of the wrists, fingers, and forearms. They make great gifts for climbers, tennis players, guitarists, piano players, drummers, and musicians. Specifications: Dimensions: L x W x H 5.2 x 4.88 x 1.61 inches Weight: 80g Color: Black Material: Silicone Quantity: 2 Rebound Level: 6 Packing List: 2 x Wrist Straps 2 x Adjustment Straps