This item is a professional and durable trombone water key cork, which is made of cork material with excellent sealing properties and can serve you for a long time. With good craftsmanship details and reasonable design, easy to replace and practical, it is an excellent replacement accessory for your musical instrument. With practical functions, it can effectively prevent air loss during high-density playback. This is an excellent musical instrument accessory that can meet your needs well. Features -Color:Chocolate -Material: Cork -Size: About 0.90X0.90X0.40cm/0.35X0.35X0.16inch -The material of choice is , safe, durable and practical. -Professional and practical, easy to use, convenient for you to replace at any time. -Simple design and durable functions can better help you . -The product is in workmanship and easy to replace. It is a perfect substitute for the trombone water key. -You can buy this efficient and practical trombone water key cork at an . Package list: 10 x cork plugs