This is one 60cm (24") 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 Futaba style connectors and will only work with Futaba female connectors or receivers. Also included is a JR style male connector housing, which you can use if you remove the Futaba style housing with a razor blade. 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.