Largon 3.2mm thick double sided PTH PCB different solder resist and silk screen each side. minimum track and gap is 8 thou minimum hole size is 0.3mm Immersion Ni/Au finish The profiled board fits within a square of sides 90mm This board is intended for attachment by soldering to a Hammamatsu Photomultiplier tube and requires profiling to the outline drawn in outlin.lgx. The profile can be cut with a max 3mm diameter router leaving 1.5mm radius fillets ( or less?) in the included angles of the profile. Gerber files are in rs274X format - extension *.lgx Drill data is excellon 4.2 metric and contained in largon.drl there are 5 drill sizes and 54 holes - detail in largon.mfg The full design database is contained in a GC-PREVUE format file -largon.cwk if this can be used by the manufacturer. 4 parts are required.