Finger Expander Exercise Hand Grip Strength Wrist Strength Hand Exerciser Resistance Rehabilitation Training Silicone Grip With the help of the finger stretcher, you can conveniently improve the strength of your fingers, forearm and wrist. It uses high-quality silicone as the main material, which has good elasticity and is not easy to tear, break or deform. Name: Silicone Finger Trainer Material: Silicone Weight: 37g (including wrist strap) Size: About 11.5*10cm/4.53*3.94in Hole Diameter: About 1.8cm/0.71in Rally: Black (13lb, 17lb, 21lb) / Gray (6.6lb, 8.8lb, 11lb) Packing List: Finger Exerciser*1pcs and Wrist Strap*1pcs Note: Due to different lighting and screen settings, item colors may vary slightly from the pictures. Due to the difference in manual measurement, please allow 1-2cm difference in size.