3.1mm 1.0mm DC Conversion Adapter Plug Set of 5 wuernine Outer Diameter 5.5mm Inner Diameter 2.1mm Female to Outer Diameter 3.1mm Inner Diameter 1.0mm Male Power Supply Conversion I received this as a gift, so I don't know much about the product. If you understand from the photos, please take a look. *Free shipping!✨ *Instant purchase OK◎ *Only one available, so first come, first served. *For bulk purchases, please comment in advance. #Click here for Tommy's product list✨☜ #Click here for Tommy's charging cables✨☜ *There were no noticeable stains on the product, but there may be oversights. *Please check the condition of the product in the photos, and purchase with the understanding that it is stored at home and will be shipped in simple packaging. *Opened for inspection 24-3