... led pcb board 1.Aluminum material; 2.Good quality with E-test ; 3. Certificate: UL, ISO,TS16949; 4. ... /T,Western Union,Paypal round led pcb board with E-test 1. ONE-STOP-SERVICE ;2. OEM service ... prototype2 layers, 4" * 5" * 100 pcs USD 150 /lot4 layers, 2" * 5" * 100 pcs USD 250 /lot6 layers, 2" ... * 5" * 100 pcs USD 350 /lotEngineering, testing, and ...