This is one box (containing 10 cases). Each case is unopened, so the number of items inside is unconfirmed. There may be different lot numbers. Please be aware of this. To avoid unexpected issues, please understand that: - These are old items (discontinued products). - They have been stored by an individual. - They were once available on the market. Please purchase only after agreeing to the above conditions. Also, please provide a specific amount when negotiating a price reduction. If you have any questions, please leave a comment and I will respond. Thank you for your consideration. ※ Discontinued High Polymer For Pro 100 Mechanical Pencil Lead