AI Summary This is a G&P SUREFIRE 6P/9P compatible light adapter. Purpose: Functions as an extension tube to convert a SUREFIRE 6V light (e.g., 6P) to 9V (using three batteries). Specifications: Made of high-strength metal with a non-slip checkering finish on the surface. Compatibility: Compatible with SUREFIRE 6P and other P-series lights, as well as compatible handheld light bodies. Features: A part that expands battery capacity to increase the output of the light. SUREFIRE A19 Expansion Adapter 6V→9V Product Code: 1019170 Manufacturer's Suggested Retail Price: ¥4,048 It appears to be discontinued. I listed this after researching on Google, as I don't know what it is. I don't have detailed knowledge about the item. I will sell it to someone interested in lights or someone who knows more about them. It will be shipped on the same day, but depending on the time of purchase, it may be shipped the next day.