Brief description about the led aluminum base pcb: 1.FR4,double-sided pcb,1.0mm, ... .2)8Min Hole Size available0.25MM9Special processingThreaded holes,step holes,speaker holes,plus plastic file box10Peel Strength1.8-3n/mm11Insulation Resistance ... have the inquiry of PCBs,pease send the files to me, then i will send the all files with attachment to you led aluminum ...