Violin Chin Rest - Barber Type Material: Ebony (Indian Ebony) Due to being the hardest material, it is said to provide a clear sound quality and have the effect of focusing the resonance. The thickness of the central part is approximately 22-24mm. It can be used in various situations, such as for those whose shoulder rest's maximum height is insufficient (long neck), those with sloping shoulders, and those who want to play with their shoulder adducted (short neck). The protrusions are smooth, providing good hold and making it less tiring for long practice sessions. There are two types of metal fittings: gold-plated and silver-plated. The metal fittings of this product are gold-plated. Please check the photos at the time of purchase.