Features: Thumb finger rest is made of rubber material, with high flexibility and a comfortable wearing feel. It is tear-resistant and durable, providing comfort and ease of use. Suitable for 14.5–17.5mm diameter thumbs, this universal design fits most users. The rubber protector helps reduce thumb discomfort, offers extra thumb support, and protects both your instruments and hands. The ergonomic shape design fits securely with your metal thumb rest. Specifications: Material: Stainless Steel + Rubber Color: As shown in the picture Package Weight: approx. 14g Thumb Rest Size: approx. 27x16x20mm / 1.1x0.6x0.8in (LxWxH) Protector Size: approx. 20x15mm / 0.8x0.5in (Dia x Thick) Note: Please allow 1–3mm error due to manual measurement. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Package Includes: 1 x Thumb Rest 1 x Rubber Cushion 2 x Screw