Specifications:Reduce joint damage: a more natural grip position.New muscle stimulation: more range of motion.More functional training: need more physical tension.Injury prevention-the best grip for joints is 90 degree position and swivel. Functional training-more dynamic exercise helps develop more stability and physical tension, these are the basic requirements for all types of strength training. Item Name: Gym Training GripsMaterial: Nylon, TPELatex Tube Tension: Blue: 20 Pounds, Black: 40 Pounds(Only Type 2 Has Latex Tube)Features: Durable, Easy to Use, Fitness AccessoriesNotes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Type 1 Package Includes:2 x Grips1 x Storage Bag Type 2