Anlu pressure washer gun question

Hi, I have a cheap Anlu pressure washer which had the inlet fitting on the gun break after about 2 hours of use. Well, I was able to get a replacement fitting, but somehow when I took the gun apart, the steel ball for the gun valve fell on the garage floor and bounced into obvlion. I looked for about 2 horus and couldn't find it. Anyway, I can't get any help from Anlu, and all I want to do is find a stainless ball the right size to fit. I'm in Portland, OR and don't know of a local steel ball retailer, so I was going to order some on the web, but I don't know what size it is. I suupose I could guess, or how can I figure out from the valve seat how big the ball should be. I figure it's got to be a pretty common size (probably metric, somewhere equivalent to about 1/4", I would think).
Anyway, if anyone has any insight as to what size the ball is, please let me know.
thanks,
danbo
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Anyone? Someone's got to know the answer to this....please!!
thanks,
danbo
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