New product
SmallRig Filter Tray (4 x 4) 3320 forms part of Mini Matte Box 3196 and allows for quick installation of 4 x 4" plug-in filters of 4mm in thickness. It connects to the matte box via a NATO clamp and supports multiple filters at the same time. It also protects plug-in filters from minor bumps. You can hold its bezels to avoid leaving scratches and fingerprints while replacing filters.
In the box: