Case and cooler clearance are the point of FIT V, not lighting or a particularly high rating. It's a 288-pin UDIMM, low-profile (33.2mm height) kit, aimed at small-form-factor builds where a standard-height module would otherwise collide with a tower cooler.
Within the family, CAS latency is the thing that actually varies: a 6000 MT/s kit at CL28 is a tighter bin than another sold under the same name at a looser rating, even though the headline MT/s figure is identical. This listing is 2×16GB at 32GB.
It's DDR5, non-ECC — worth confirming your case and cooler clearance against the module height before assuming a low-profile kit is unnecessary, and checking that your board's BIOS actually offers an XMP or EXPO profile at 6000 MT/s before buying for that specific rating.