PolarPro Basecamp Matte Box Kit with Variable ND 2-5 & Polarizer Filters, and plus VND 6-9 filters. Bought it brand new from B&H, never opened. It can adapt lens from 77 & 82 mm front threads, including 80, 87, 95, 100, 104 & 110mm Clamp Rings. It's light weight, perfect for larger cinema lenses. B&H currently sells it for $550, not including the VND 6-9 filters, which I bought separately. I am selling it with unopened all the original boxing, and I just never found use of it.