This product is from "Sogo Rikagaku Garasu Seisakusho," which unfortunately went bankrupt in March 2025, ending its long history. It was highly regarded in the field of science and chemistry for its high-quality domestic glassware, and it will be extremely difficult to obtain these products in the future. Although it is a new, unused item, it is a piece of scientific equipment, so there may be fingerprints from inspection or scratches and dirt from storage. The images are reused.