Features: Thumb rest is made of rubber material with high flexibility and provides a comfortable wearing experience. It is tear-resistant and durable. Designed for ease of use and comfort, suitable for thumb diameters of 14.517.5mm. The rubber protector helps reduce thumb discomfort, provides extra thumb support, and protects your instrument and hand. Ergonomic design enhances playing performance and fits securely on most metal thumb rests. Its shape is designed to fit most standard thumb rest mounts perfectly.Specifications: Material: Stainless Steel + Rubber Color: As shown in picture Package Weight: approx. 14g Thumb Rest Size: approx. 27 x 16 x 20mm / 1.1 x 0.6 x 0.8in (L x W x H) Protector Size: approx. 20 x 15mm / 0.8 x 0.5in (Dia x Thick)Note: Please allow 13mm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the actual color may vary slightly from the image. Thank you.Package Includes: 1 x Thumb Rest 1 x Rubber Cushion 2 x Screw