***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy ***** Have a look here http://jp.hamamatsu.com/resources/products/etd/eng/html/pmt_003.html Cheers On 22/01/2011, at 11:54 AM, Phillips, Thomas E. wrote: > GaAsP