Patriot's Viper Steel is a DDR4-3200 line built around a straightforward split: a CL16 tier and a slower CL18 tier, both sold across the same set of capacities from 16GB up to 64GB.
This 1×32GB kit is rated 3200 MT/s CL18 — worth checking directly, since the two timing tiers are listed side by side rather than one replacing the other. Single-stick and two-module configurations both exist at every capacity point in this family.
All of it is unbuffered UDIMM DDR4, built for consumer desktop boards rather than workstation or server platforms that call for registered or ECC memory.