Designed for use with the Mini Matte Box 3196, this 4 x 4" Filter Tray from SmallRig mounts onto the frame of the matte box using a NATO clamp, and it can be used alongside additional filter trays. The lightweight plastic and fiberglass filter tray accepts multiple 4 x 4" filters of 4mm thickness. It features a side bezel to protect the filters from scratching and fingerprints.