This is a display frame purchased from Store Express. It's now discontinued. You can insert thick styrene boards inside, allowing you to pin things for display. I used it for jewelry display, replacing the original backing board with a velvet-covered board. I'll sell it as is, with the velvet attached. If you prefer, you can swap it out for the black backing board. The original black backing board is new and unused. It cost around 5000 yen each at the time. I'm also selling another one of the same item separately. The material is resin, so it's lightweight and sturdy, making it ideal for display. Frame size: 15 x 21 cm Inner opening: 9 x 15 cm #jewelrydisplay #engraving #engravingtools