This product is a diffusion gel filter for use with a specific lighting fixture called a Kentrobrite. This filter is used to diffuse light and create more uniform illumination. It comes in a pack of 6 and is made in China. I no longer have a use for it. Would anyone like it? Please check the size in the images. Price reductions: June 15th: ¥2300 → ¥2000 June 17th: ¥1800 June 21st: ¥1600 June 24th: ¥1400 June 26th: ¥1200 July 4th: ¥1000 July 12th: ¥800