diagramma

Has anyone had these? Does anyone have a photo or link to information on these. Just doing some research as someone asked me to take one of these from him and I am not sure on compatability and want to make sure I do the right thing here. Thanks Rob

I've got 6 of these for sale. 8 each .. they are 1 inch. E-mail or pm me. I'm 10 min fro BWI airport.