Source GiAi CPL filter 72mm 18-layer nano coated camera CPL filter with Cu thread on m.alibaba.com
K&F Concept 72mm Nano-X CPL Magnetic Filter SKU.1706 - Adorama
72mm Circular Polarizer II | Nikon
72mm 2 in 1 Filter Kit MCUV+CPL Filters, HD/Waterproof/Scratch-resistant/Anti-reflection, with Upper and Lower Metal Lens Caps & Storage Bag - KENTFAITH
Moment 72mm AntiGlare CPL Filter (600-087) - Moment