New product
The NiSi CPL Filter for NiSi 100mm V3/V5/V5 Pro is an 86mm PRO C-PL that works exclusively with the NiSi 100mm V3/V5/V5 Pro Holder, it can't be installed in the lens directly.
The Enhanced Landscape version of the CPL improves saturation in landscape images compared with the included C-PL with the V5 kit and other 100mm kits.