Your pair of clips are perfect for holding sheet music in the stand so they 't get blown by the wind. Use with music stands and other collapsible stands with thin shelves. These clear sheet music holders slide onto the shelves of the music stand to hold your music in place while still allowing for quick song transitions. It also allows you to turn pages easily. Your rectangular clip-on sheet music stand wind clip is made from durable shatterproof acrylic. Color: Transparent Material: acrylic Package Contents: 2 x Spectrum Tiber Clamp 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.