Solid brass slide: Provide treble and more stable , for longer stretches and full tone.304 stainless steel guitar slide: provide great resonance, good intonation, and a clear sound.Borosilicate glass guitar slide feature: heat treated and annealed for smooth performance, smooth, sturdy and durable. Accentuate the middle harmonics of your sound, and provide warm, silky bluesy slide sounds, suitable for slide guitar, acoustic guitar and .Material:Celluloid + Stainless Steel + Glasscolour:Photo ColorPackage Contents:1 * Brass slide1 * Steel slide1 * Glass slide6 * guitar picks3 * finger picks1 * thumb pickOnly the above package content, other products are not included.Note: Light 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.