Features: Made of high-quality glass, compact and light-weight. Bright resonant tone, excellent intonation. High quality 1.6mm thick wall, good durability. Inside diameter 19mm. Perfect for guitarist. Specifications: Colour: Transparent Material: Glass Slide length: 68mm / 2.6in Outer diameter: 22mm / 0.9in Inside Diameter: 19mm / 0.74in Wall thickness: 1.6mm / 0.06in Slide weight: 12g / 0.4oz Package size: 13 * 10 * 2.4cm / 5.1 * 4 * 1.1in Package weight: 25g / 0.9oz