The NiSi JetMag Pro 100mm Holder Kit is a magnetic filter system designed to support standard 100 mm wide GND filters with JetMag Pro filters. It includes the 100 mm holder and an 82MAG magnetic adapter ring, enabling fast magnetic attachment to JetMag Pro filters (not the adapter ring) with a secure twist-lock. The holder rotates 360° for accurate alignment, suits complex lighting control in stills or video, and works without vignetting at 16 mm with one filter. Minor vignetting may appear with two filters but can be corrected in post.