This is a holder for attaching a pencil to the tubing of a horn. It can also be attached to a trumpet, but this has not been confirmed as there is no actual instrument available. Please check the size. Two sets will be sent. Size: Approximately 2.5 x 1.2 This is a no-brand product. There may be some size variations. If you are looking for perfection, please purchase a branded product. ------------------- Horn French horn Accessories Mouthpiece Orchestra Wind band Brass band Pen clip Pencil clip