Features: 100% brand new. Glass Slide: made of seamless Pyrex glass and processed from good quality boron silicate which is heat treated and annealed. Metal guide: made of durable 304 stainless steel with good quality; It can offer excellent maintenance, excellent intonation, and clear, bright sound. The glass slide can highlight the mid-harmonic sound and provide silky blues slide sounds, suitable for professionals and beginner applications. Color: clear, silverMaterial: glass, stainless steel. Length: About 6cm / 2.36in Inner Diameter: About 2.1cm / 0.82in Outer Diameter: About 2.5cm / 0.98in Package List: 2pcs Guitar SlidesNote: Please allow 1-3mm error due to manual measurement. Make sure you don't mind before you bid. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.