NiSi Cinema 4x4-Inch or 100x100mm Filter Tray for C5 Matte BoxNiSi NIC C5 TRAY44 Cinema 4x4 Inch or 100x100mm Filter Tray for C5 Matte Box The NiSi Cinema 4x4 or 100x100mm Filter Tray for C5 Matte Box is designed to be used with the C5 Matte Box System. It can hold either 2mm or 4mm filters, with the size being 4 x 4 or 100mm x 100mm. It has a full aluminum construction with a spring loaded filter holding solution. Key Features Designed for use with the NiSi C5 Matte Box System Made from aluminum Fits 4 x 4 or