: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Made of ceramic, it's durable.4.Suitable for all electric and acoustic guitar.5.Easy to use, functional, and it's very convenient to carry. Attentions:The inner diameter of the product is subject to the actual product. Specification:Color: WhiteMaterial: CeramicSize: 30 x 20 x 70mm/1.18 x 0.08 x 2.76 inch (OD x ID x H)Weight: 76g Package include:1 x Guitar Slide