Thank you for viewing. These are Y-shaped connection terminals, commonly used for extracting power when adding electrical components to motorcycles, cars, trucks, etc. (Red x 4, Yellow x 4) The crimp terminals are from the reliable brand, Hitachi Auto Parts. To enhance durability and eliminate voltage drop, we use 0.75sq 30-core copper wire for the yellow wires. Voltage is compatible with both 12V and 24V systems. If you have any questions or special requests, please feel free to comment. As these are handmade, there may be some variations in length, so please refrain from purchasing if you are overly concerned about this. The wires are cut to 8cm before processing, resulting in a finished length of approximately 10cm. Due to shipping, the packaging will be kept thin, so please understand. This listing includes consumption tax and shipping costs. Thank you for your business.