Flute Cap: Designed specifically for flute replacement parts, this flute cap set is a must-have accessory for woodwind players. Inst ent Parts: and compact, making this mouthpiece nut highly portable and easy to carry. Grooved Crown End Cap: Made from copper material, this head tube nut is built to last and reliable performance. Nut: With humanized design, this slot head nut is easy to install and remove, and easy to maintain. Slotted Crown Screws: Provide a stable, secure connection for optimal playability. Colour:Silver Material:copper Package Contents: 1x Flute mouthpiece screw cap 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.