Shenzen pricing, 6 layer board with 8 mils holes, and 4 mil clearance. ENIG finish. 2.3"x3.3" Looking at the picture of their board the package is most likely

Shenzen pricing, 6 layer board with 8 mils holes, and 4 mil clearance. ENIG finish. 2.3"x3.3" Looking at the picture of their board the package is most likely 0.65 or -- possibly 0.4 -- pitch which means much laser drilled holes.