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Schneider 4 x 5.65" Neutral Density Attenuator 0.6 Filter
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Nisi 4x4", 4x5.6" Filter holder kit | MTF Services
Formatt Hitech 4x4" Filter Starter Kit #1 BF 4X4-KIT1 B&H Photo
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Arri LMB-3 Matte Box with 2x Filter Trays 4x4 | eBay
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4 x 4″ Filter Tray for MB-T03 and MB-T05 | Tilta
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Cinegear 2016: NiSi's 4x4 cine filter holder is lightweight and inexpensive - Newsshooter
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NiSi Cinema 4×4” Linear Polarizer Filter | NiSi Optics USA
Amazon.com : Fotga Pro ND1000 Multi-Coated MC ND 4x4 3.0 Glass Neutral Density Filter for 4x4inch Matte Box Cokin Z Hitech Lee Lens Filter Trays Holder … : Electronics
Nisi 4x4", 4x5.6" Filter holder kit | MTF Services
