Polyester case to protect film with ISO 400 or lower from X-rays. - Brand: HAKUBA - Product Name: X-Ray Safety Case - Price: ¥2,000 - Film Sensitivity: ISO 400 or lower - Size: 35mm x 34 exposures - Material: Polyester - Purpose: Protects film from X-rays It has been stored on a bookshelf at my parents' house for a long time. I believe it is unused. I don't know when it was purchased. Please consider this with your understanding.