This is one 30cm (12") universal servo extension lead from ProTek R/C. These are excellent servo extension leads made with thick, high quality 22awg wire for maximum current carrying capacity and strength. The male plug installed on these extension leads are JR style connectors. The female end is designed to accept Futaba connectors, as well as JR, Aitronics and HiTec connectors. When plugging JR style connectors into the female connector, be sure to check for the correct polarity