The PolarPro Hero8 Rollcage Shutter Collection includes an ND8, ND16, and ND32 filter. Each filter is made from PolarPro Cinema Series glass with a machined aluminum frame. The snap-on magnetic frame provides a base to attach your filters to. Each included filter has been designed specifically for your HERO8 camera when in the Rollcage Protective Sleeve and has provisions to accept an included tether. The ND8 filter requires a 3-stop compensation, the ND16 requires 4 stops of compensation, and the ND32 requires 5 stops. Using ND filters enables shooting with more cinematic shutter speeds when outdoors. Each filter has 16 layers of coatings that provide protection from reflections, scratches, fingerprints, as well as water and oil droplets.