Brand : KETTLER Type : Hand amp; Finger Ring Colour : Grey amp; Burgundy Material : High Density Soft Rubber Contain : 2 pcs (Small amp; Large) / 2 pcs (Kecil amp; Besar) - 100% ORIGINAL PRODUCT - KETTLER Hand amp; Finger Ring is designed for rehabilitation and strengthening the hand and wrist area. The Ring effectively targets the finger extensor and flexor muscles from the tip of the finger to the elbow, reducing any muscle imbalances in the hand and forearm. The firm one is more suitable for sports performance optimization, while the medium one is catered towards post-injury rehabilitation. Specification : - Small Ring Outer Diameter : 7cm Inner Diameter : 3.5cm - Large Ring Outer Diameter : 8.8cm Inner Diameter : 4cm