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The measurements are clearly listed on the link you listed. Now you just have to find a tape measure or ruler and measure the things that you want to put inside the Pelican case. Another way would be to go the the manufactures specification page for each item that you wanted to put in the case and get the measurements from there.

Once you have those measurements you then add them together and see if they are still within the measurements listed on the Pelican site.

I'm not sure why you would need someone else to do this for you.
 
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