Features: 41PCS universal plugs converters for external laptop power battery or laptop universal power adapter to charge your computer. Used for laptop repair, component replacement, external power supply or vehicle mounted. The 5.5x2.1mm female base converts 5.5x2.1mm into 41 types of connector sizes, such as portable laptop power banks and adapters. Wide compatibility: for appliances such as WiFi routers, ARTphones, speakers, cameras, security devices, LED lights, digital and video, mini fans, etc. We suggest that you measure theDC size of your laptop or device and determine the size you want.Portable and compact: Portable and compact, suitable for your travel use, very suitable for maintenance, DIY projects, etc Specifications: Material:ABS Quantity：41PCS Types：4.5x3.0mm, 7.9x5.5mm, 7.4x5.0mm 4-hole Tip, 3-hole Tip Black， 6.3x3.0mm 5.5x2.5mm,5.5x2.1mm, 5.5x1.9mm, 5.5x1.5mm ,5.0x2.5mm ,5.0x2.1mm 4.0x1.35,6.0x1.4mm 6.3x3.0mm, 5.5x2.5mm，5.5x2.1mm 5.5x1.7mm 5.0x1.1mm 4.8x1.7mm 4.0x1.7mm 3.5x1.35mm 3.0x1.1mm 5.5x2.5mm 5.5x2.5mm 5.5x1.5mm 5.5x1.7mm 4.8x1.7mm 3.5mm Mono,2.5mm Mono 2.5x0.7mm 2.35x0.8mm 2.0x0.5mm 7.4x5.0mm 7.4x5.0mm 4.5x3.0mm 4.5x3.0mm Package Includes: 1Set Adapters note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!