Material: Made from thermoplastic rubber, polypropylene, and strong steel spring. Options: Choose from blue, black, or grey - or opt for two random coloured grips. Fully Adjustable: Adjustable strength from 5-60kgs means this hand grip can be used by beginners and professionals alike. Size: 16cm x 11cm. Hand Grips: Improve your strength with an adjustable fitness hand grip. | Adjustable Fitness Hand Grip - Black | Wowcher