It can remain attached to the instrument during performance. Flexible, which can help you to drag the alternation tube more conveniently when you are playing. Designed to prevent the trumpet valve slides 1st and 3rd slides from slipping off. It is made of silicone rubber, which will not harm the Instruments finish. Easy to install. A good replacement part for broken or old one. Application: It is possible to use it in three different positions.It can remain attached to the instrument during performance. Color: Black Material: silicon rubber Package Contents: 6 x Small totra rope Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.