1.low  cost..Monimum cost for 3 prototype Pcb is $54 only
2.short lead time
3:pcb ROHS compliant
material:fr4,hight TG FR4,Halogen Free material,CEM-3.Rogers HF materials.etc.
layer counts:2-28layers
Finished Copper Thickness:0.5-5 oz
Finished  Board Thickness 0.2-6.0mm
Min. Line/Track Width:4ml
Min. Line/Track Space:4ml
Min.Contour Tolerance:+/-0.1mm
Max.Board Thickness/Hole Ratio:12:1
Min.solder Mask Bridge:4mil(Min.SMT Pad Space 8mil)
Min Legend(Silkscreen)Track Width:5mil
Min Legend(Silkscreen)Height:30mil
Min drilling slot size:0.6mm
Solder mask color:green,black,blue,white,yellow,purple,and matt .etc
Solder mask hardness:6H
Legend/silkscreen color:white,yellow.black,etc
Surface treatment:HAL.Lead Free HAL.immersion gold,OSP,immersion tin,immersion silver,etc
other Technology:Gold finger,peelable mask,Non-across blind/buried vias,characteristic impedance control.Rigid-flex board etc
Reliability Test:Flying probe test/fixture test,impedance test.solderability test,thermal shock test ,hole