1. External diameter of the plug: 5.5mm. 2. Internal diameter of the plug: 2.1mm. 3. Dimension: 38mm(L) x 14mm(W) x 10mm(H). 4. 5.5mm x 2.1mm Female power plug connector. 5. Color: Black Features: 1. 100% brand new and high quality 2. Simply & Professional appearance for power cabling 3. Perfect for connecting the LED cctv power supply with Strip! 4. With this item you don’t need to solder! 5. Easy, cheap and fine! 6. Screw terminals (for open wire leads), suitable for single color LED strip! 7. Easier for Single color LED strip such as 5050 3528 5630 led strip, CCTV Camera installation, save time and more securer cable connection.