... PTFE, BergquistSurface Treatment: HASL,HASL lead-free,HAL,Flash gold,immersion gold,OSP,Gold Finger Palting,Selective ... , immersion silver,immersion tin, Carbon ink,peelable mask Board Size: 650mm*1000mmBoard Layer: 1L-26LBoard thickness: 0 ... -cost Protopype pcb: $100 for 10 pcsQTY: 10pcs Board size: 100mm x 150mmNO Layer: doublelayer Material: FR4 ... the soonest. FR4 material 2L step print circuit board