Blind/buried via, carbon lnk, O.S.P, gold finger, immersion tin, immersion tin, peelable mask, aluminum based PCB, teflon PCB, high-tg PCB, double-sided & multi-layer PCBS, HDI PCBS, etc. That all meet rohs, and ul rrequirements
Fr-4, aluminum based, 1 to 4 layaers
Carton