I purchased this on Amazon on December 22nd of last year for 1620 yen. It is unused. For shipping, I will take the product out of the box and fold the box to include it with the item. Thank you! *I'm not sure if I can accommodate your request, but feel free to negotiate the price! 【Product Overview】 This dissolved hydrogen concentration test reagent is a product that allows you to easily measure the concentration of hydrogen water. It has been granted patent number 4511361 and is a reliable reagent. 【How to Use】 By adding the reagent to a specified amount of water, you can confirm the presence of hydrogen. It's easy to use, so you can easily measure the concentration of hydrogen water at home. 【Features】 This reagent is particularly useful for quality control of hydrogen water. It is a very useful item for those interested in health and dieting. - Brand: MiZ - Product Name: Dissolved Hydrogen Concentration Test Reagent - How to Use: Reagent for measuring the concentration of hydrogen water