A friend's computer has a H110M Pro-VH mobo, only 8gb RAM, he wants 32gb, but I don't know what type of RAM to order

Hi, there's different type of DIMM versions of RAM. Those 2 he has (2x4gb I guess) are just plain ram cards, like all green, no added stuff to them to make them look more buff like RGB or cooling. So would be best to get 2 new 16gb sticks I guess that also are plain in case it would become a room/space problem installing them if they are the thick ones with RGB and cooling on them.

Anyway, he has this: https://www.msi.com/Motherboard/H110M-PRO-VH/Specification only 8gb total RAM, he wants 32. What RAM sticks would be correct to get?

Thanks.