I can confirm this is compatible with the k40 ribbon.

Lasers
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1

I can confirm this is compatible with the k40 ribbon. (EU users)

2

Sorry but I cannot read all of the specs. Looks the same but do not see any dimensions.

See if this blog post helps you do the comparison. See part #s at the bottom.

3

Well, i suppose i have to bet for it anyway, not much lose though. $2 against $20 fare fee. Thanks @donkjr