Thank you for viewing! This is a case to protect 3D printer filament from moisture, made using Inomata Chemical's dried food stocker 6.0 airtight container. This is a set of 2. (Single item is 2800 yen.) We will also include the silica gel originally included with the Inomata Chemical dried food stocker, so you can use it right away. (With instructions) This is mainly based on Mugicha-san's spool, further arranged for ease of use. [Reference Video/Mugicha-san's Page] https://www.youtube.com/watch?v=NSq9b6FQUHs [Spool Section] https://mugimugi159.booth.pm/items/5581594 [Fitting Section] https://www.thingiverse.com/thing:3058740