Okay, I didn't realise there were so many variants! These have six channels (obviously) with each channel having two sockets. The fuses are all mounted to one side of the sockets in a vertical line. There is a multi-position switch and a knob on the front to allow local control of a single channel. I'm afraid I can't remember the colour despite having seen them only a couple of hours ago. Thing is, as I mentioned above, I didn't really want to replace the whole fuse holder just the carrier that slots in. Do the carriers vary between panel mounted and PCB mounted holders or are they all the same? I hoped that getting replacements would be fairly straight forward and Gareth's first reply seemed to confirm that but it now looks a lot more complicated. Edited to fix grammar.