Features 1、Rubber material, high flexibility, comfortable wearing feeling, tear-resistant and durable. 2、Suitable for oboe clarinet instruments within 1.45 - 1.75cm metal thumb rest. 3、Provides extra thumb rest and protects your instrument and hands, alleviating the fatigue of long-term playing. 4、Special shape design fits your metal thumb rest very perfectly. 5、Wonderful term to rest your thumb and bring you better playing performance. Specifications: Features: Rubber material, high flexibility, comfortable wearing feeling, tear-resistant and durable. Suitable for oboe clarinet instruments within 1.45 - 1.75cm metal thumb rest. Provides extra thumb rest and protects your instrument and hands, alleviating the fatigue of long-term playing. Special shape design fits your metal thumb rest very perfectly. Wonderful term to rest your thumb and bring you better playing performance. Specification: Condition: 100% Brand New Material: Rubber Color: Black Quantity: 1Pc Opening Thickness: Approx. 1.5mm / 0.05inch, 3.5mm / 0.14inch(Optional) Suit for Oboe Clarinet Instruments Applicable Metal Thumb Rest Size: Approx. 1.45 - 1.75cm / 0.57- 0.69inch Dimensions(L x W x H): Approx. 38 x 22 x 28mm / 1.5 x 0.87 x 1.10inch Weight: Approx. 9g Packing List: 1 x Thumb Finger Rest Package List