Features: Guitar thumb rest, Bass thumbrest is made of plastic. A good replacement part for broken or old-one. Durable smooth plastic cushion, provides extras thumb rest and protection for your hands and the instrument. With mounting screws. It is easy to install and fits perfect for your guitar and bass. Help to maintain the correct finger position. Reduce the strength required to play the instrument, relieve repetitive strain injury, help to alleviate the fatigue of long-term instrument playing. Great accessory for guitar and bass instrument. You can freely set this part on the bass you want. Specifications: Material: Plastic Size: Approx. 6.6x1.3x1.4cm/2.6x0.51x0.59inch 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 Thumbrest