Material: ABSSize: 10.8 x 14cmColor: Black BlueNotes:1. Manual measuring, please allow 1-3mm error,thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 1Built in LCD screen with double lines counter,you can easily get the exercise count, timer and calorie consumption from this grip exerciser. 2Ergonomic design fits all hand sizes for men, women, seniors, kids. Durable for long term use, no deformation. 3Grooves and non slip particlesin the grip provide maximum comfort and prevent the gripper from slipping. 4The grip strength trainer with reinforced structure, durable, not easy to damage. 5Perfect for athletic training, sport, home, and clinical use. It can help you set daily or monthly fitness goal.