Thank you for viewing! ^_^ This is a glass slide. It's the most popular slide currently, known for producing a warm tone. Made with high-quality Boron Silicate and heat-treated to create a flawless tube. It hasn't been used much, so there are no noticeable scratches or stains. However, as it has been stored for a long time, there may be some minor dirt or scratches. Please note that this item is sold as-is, with no returns or exchanges. I will ship quickly and carefully. Thank you very much. m(_ _)m