Solid brass slide: Provide treble and more stable bass, for longer stretches and full tone. 304 stainless steel guitar slide: provide great resonance, good intonation, and a clear bright 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 bass. Material:Celluloid and Stainless Steel and Glass colour:Photo Color Package Contents: 1 x Brass slide 1 x Steel slide 1 x Glass slide 6 x guitar picks 3 x finger picks 1 x thumb pick Only the above package content, other products are not included. Note: Light shooting 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 and /- 1-3cm.