the "p" isnt great, projected tip, but otherwise its fine... they work.
its always a good idea to research things first...like checking out things like this...
and then you can see that all that matters is;
the first letter, which is the thread diameter. B in our case....
the number, which is the heat range. stick with 5-7 with ngk plugs.
the letter after the number...anything with an E (or Z on closer inspection?) is bad news for these engines.
and other than that, everything is pretty well much interchangeable... the P i mentioned, projected tips...can hit pistons. why its a good idea to check for clearance when installing odd ball plugs. i see that K can mean the same thing too... always learning!
taper seats work but are not ideal, either...
what is funny is that NGK will not supply a list of all possible plugs they manufacture unless you are a manufacturer! i have asked... i dont see why they cant?
what they sent you is the stock standard lawnmower/brushcutter plug. perfectly fine.