There are quite a number of different focusing screens available from DHW-fototechnik. These screens will universally fit all the medium format models from TLR to Hy6 though some are better suited for single purposes. The gridded screen helps with framing for architecture for example and the ground glass screen can be excellent for macro work. The split prism and micro prism work as focus aids to help indicated the area of focus, but some prefer to have a clear screen for ease of compositon.
I now carry Maxwell Precision Optics focusing screens for all camera models as well.
Currently I have stock of the Maxwell Brilliant Matte Screens for many of the cameras including for older TLR's and newer TLR's
Please note: Since Focus screens are delicate and easily marked, they are not returnable once opened and installed.