Features: Double Strength: One rings has two types of strength to meet multiple training requirements. Strengthening grip strength: Unlike traditional grip rings, this product adopts a convexity angles designs, making grip more challenging and allowing for more comprehensive exercise of hand muscle groups. Durable material: Made of silicone, it has good elasticity and durability, and can withstand long-term use and frequent training. Stripes antislip: The surfaces of the grip rings adopts a stripes designs, which increases the friction during grip and effectively prevents slipping, making grip training more stable and reliable. Easy to carry: compact and lightweight, allowing for grip training anytimes and anywhere, meeting users' fitness needs. Specifications: Material: Silicone Type: Pink 20 to 30LB/Light Green 30 to 40LB/Light Blue 40 to 50LB/Blue 50 to 60LB/Deep GreyColor 70 to 80LB Size: As shown in the picture Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Hand Strengthener Grip Rings