These are the Hitec Unassembled Male Connectors. FEATURES: Compatible with Futaba J, Hitec, Airtronics Z and JR systems Allows modelers to custom make their own extensions, servo leads, battery leads and more Fits wire sizes from 20 to 30 AWG No soldering required INCLUDES: 3 sockets and 1 unassembled male shells REQUIRES: Servo wire (HRCM3001) Wire crimping tool tlw 7/12/07