MaterialThe thumb rest is made of rubber, which is soft to the touch, good flexibility, comfortable to use and not easy to tear. SizeThe size is 1.5*0.87*1.1in/3.8*2.2*2.8cm, suitable for clarinet and oboe of 0.57-0.69in/1.45-1.75cm diameter. AdvantageHelp to maintain the correct finger position and to rest your thumb and bring you better performance. Protecting the instrument, and reduce pressure by long term playing. DesignSoft rubber finger rest with ergonomic curved design for an ultra-comfortable fit, flexibility and increase compression. This prevents painful bruises and blisters. ApplicationNo more pain from those long rehearsals and concerts It's a great accessory for oboe clarinet enthusiasts. Product material: rubber Color: Black Applicable instruments: 1.45-1.75cm caliber clarinet oboe Included accessories: 1*finger rest cover Product Size: 38*22*28mm Product weight: 8g Package includes: 1pc* instrument accessories