This is a customizable nozzle mount for the Ormerod printer. You can choose whether it is the same width as the standard Ormerod nozzle mount, or the wider version to support dual-nozzle print heads. You can have 1, 2 or 3 slots in it for the Bowden filament tubes. You can also configure the mounting angle of the print head, to compensate for any tendency of the head to sag. And you can choose a long version to help keep the x-carriage and other printer parts cooler when printing ABS.Open the .scad file in OpenScad, edit the parameters at the top of the file according to your requirements, press F6 to render, and export the STL. The two pre-made STL files are for dual-nozzle printer heads, or single-nozzle heads with the wider heatsink block. See http://miscsolutions.wordpress.com/2014/07/27/converting-the-reprappro-ormerod-to-dual-colour/ for details of the dual nozzle Ormerod conversion.