What you have here is a Laowa-made lens that comes with a Nikon F mount. Your filters need to have a diameter of 67 mm to fit this lens.
From Photospecialist
Venus Optics LAOWA 100mm f/2.8 2X Ultra-Macro APO Lens for Nikon AI
WEX Photo Video
Laowa 100mm f2.8 2X Ultra Macro APO Lens for Nikon F