Crucial also sells a desktop DDR4 UDIMM line spanning a wider speed range than its laptop SODIMM equivalent — 2133 up through 3200 — again gathered under one product name keyed to the top speed grade.
The 2×16GB kit here runs 3200 MT/s CL22; capacity across the family covers 16GB and 32GB configurations, including a 4x8GB quad-module option at the low end of the speed range. Because the same 32GB capacity appears at several different speeds within this line, the rated speed on the individual listing is the number that matters, not the family name.
This is unbuffered DDR4 UDIMM for standard desktop motherboards, not the SODIMM form factor used in laptops.