... led lighting products 2.led round al pcb base board 3.Fast delivery,competitive price 4.ROHS, UL, ISO9001-2000 1. led ... round cob al pcb base board for lighting products2.Product application for Resident and commercial lighting, LED bulb, and spot light ... ,OSP,immersion silver,immersion tin,peelable mask Board Size: 650mm*1000mmBoard Layer: 1L-4LBoard thickness ... 25W F49 Circular COB LED PCBA board