Description: Fully closed without clamping hands, the spring is not exposed, which is safer and more firm. Streamlined design, more fit the palm, practice is not easy to fatigue. High quality silica gel pad, with silica gel pad at the top and bottom, comfortable handle, anti slip and anti perspiration. Groove setting, finger positioning, anti-skid. The buttons are flexible and durable. Specifications: Dimension length: 8.8 * 6.7 * 2.5cm Net weight: about 82g Material: ABS Product features: portable, easy to carry Origin: China Children's: strength 2-5 pounds, users: 4-10 years old children Adult: strength 4-7 pounds, suitable for people over 10 years old Package Included: Finger force device*1 Notes: 1-2cm error might exist due to manual measurements, please kindly understand. The colors deviation might differ due to different monitor settings. We provide you with the best product and service. If you have any problem, please let us know, and we will solve the problem ASAP. Thank you so much. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store