The product is a set of two slide guitar books, including a glass slider. The glass slider is a unique and high-quality accessory for guitar players looking to enhance their slide playing technique. The brand of the glass slider is not specified, but it is a durable and essential item for any guitarist interested in incorporating slide playing into their music. The two slide guitar books included in the set likely offer instructional content and exercises to help guitarists improve their slide technique, making it a valuable resource for aspiring players.
