... base material,1oz copper, board T1mm2. Immersion gold with plating silver3. Excellent quality with competitive price4. Application for commercial lighting , led ... ,HASL lead-free,HAL, immersion gold,OSP,immersion silver,immersion tin, peelable mask Board Size: 650mm*1000mmBoard Layer: 1L-4LBoard ... Copper thickness: 0.5 OZ to 3 OZCopper thickness in hole: >20um 1mm round led cob alminum base pcb board