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I see from the post that you are looking to purchase a power supply for your HP notebook and you would need assistance in finding the correct part. Don't worry I'll try my best to help you with this,
I would suggest you can find this information on the Maintenance and Service guide - Under Miscellaneous part - page no. 31/128 for HP Smart AC Adapter: and Power cord.
You could either get this from our HP part store website, using this link or you can contact our HP phone support so that they can help you find the right part.
If your product is out of warranty, please choose paid options to get the tech support number.
Please use the following link to create yourself a case number, then call and it may help speed up the call process: