Features: Thumb finger rest is made of rubber material, with high elasticity, comfortable wearing feeling. It is tear-resistant and durable. It makes you feel comfortable, easy to use. For thumb diameter 14.5 17.5mm, they are suitable universal. The rubber protector can eliminate thumb pain, protect the extra thumb, and protect instruments and hand. A wonderful term to rest your thumb and ensure better game performance. Its special shape fits perfectly on your metal thumb. Specifications:Material: Stainless Steel + RubberColor: As the picture showsPackage weight: approx.14gThumb rest size: approx.27x16x20mm/1.1x0.6x0.8in (LxWxH)Protector size: approx.20x15mm/0.8x0.5in (DiaxThick)Note:Please allow 1-3mm error due to manual measurement. Make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1pc x Thumb Rest1pc x Rubber Cushion2pcs x Screw