OdiySurveil(TM) 30PCS 10 Inch(30cm) 2.1 x 5.5mm DC Power Pigtail cable for CCTV Security Camera (Pack of 15 Male + 15 Female DC Plug cable ) DC Male and Female match Power Pigtail wire,as universal usage, RED wire for DC+,BLACK wire for DC-; Center positive 2.1mm DC plug,with male and female plug cable ,you can purchase all in one order,and they can give you a convenient match; Outside diameter: 5.5mm,can be used in home and industrial ,also for DIY electronics; Length: 10 inches,18 gauge for each one, easy installation; Male and Female Pigtail Connector(15 male and 15 female,totally 30 pcs pigtail cable included)