[11 Pcs Connector Kits]: Universal DC female socket 5.5x2.1mm (compatible 5.5x2.5mm) to male plug size: 6.0x4.4mm (with pin inside) | 6.3x3.0mm | 5.0x3.0mm (with pin inside) | 5.5x2.5mm | 5.5x1.7mm | 4.8x1.7mm | 4.0x1.7mm | 3.5x1.35mm | 3.0x1.1mm | 2.5x0.7mm | LED Terminal Connector | [Broad Compatibility]: Suitable for converting connector sizes into circular DC jacks for various electronic devices such as; laptops, humidifiers, speakers, and more. | [DIY Multifunctional]: Multifunctional use. It saves you more money than having to buy a new adapter. Or frustrated because you can't find an adapter that fits the plug size. | [Important Note:]: Before purchasing, please check if the DC plug size of your adapter is 5.5*2.1mm & 5.5*2.5mm. | [Important Note:]: This DC connector plug only converts the size, but cannot convert the volts, amperage, wattage, current value, and voltage value of the adapter. Please do not convert the power adapter that is not compatible with the equipment specifications.