RAM 8gb ddr4 - help

So i was on uk.crucial and they recommended the above as compatible for my son's laptop. Currently have 8gb installed and would like to double it up.

Can anyone advise of other products that woild be compatible as this seems expensive and will take weeks to arrive?

Or is it simply 8gb ddr4 3200 mt/s SO-DIMM 260-pin?

(Love that the description has so dim in it. Very apt lol)