firstpcb — PCBWay fabrication package
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Board specifications
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Size:               81.0 mm x 60.0 mm (rectangular)
Layers:             2 (F.Cu, B.Cu)
Thickness:          1.6 mm (default; confirm in checkout)
Min trace/space:    0.20 mm
Min hole:           0.30 mm (PTH); 2.20 mm NPTH for M2 mounting holes
Finish:             HASL (default; ENIG OK)
Solder mask:        Green (default; any color)
Silkscreen:         White
Units:              mm, absolute origin

File manifest
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firstpcb-F_Cu.gtl            Top copper
firstpcb-B_Cu.gbl            Bottom copper
firstpcb-F_Mask.gts          Top solder mask
firstpcb-B_Mask.gbs          Bottom solder mask
firstpcb-F_Silkscreen.gto    Top silkscreen
firstpcb-B_Silkscreen.gbo    Bottom silkscreen
firstpcb-F_Paste.gtp         Top paste (for stencil; optional)
firstpcb-B_Paste.gbp         Bottom paste (no SMD on bottom; effectively empty)
firstpcb-Edge_Cuts.gm1       Board outline
firstpcb-PTH.drl             Plated through holes (78 hits)
firstpcb-NPTH.drl            Non-plated holes (4 hits, 2.20 mm M2 mounting)
firstpcb-PTH-drl_map.pdf     PTH drill map (reference only)
firstpcb-NPTH-drl_map.pdf    NPTH drill map (reference only)
firstpcb-job.gbrjob          KiCad gerber job file (reference)

Notes
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- Gerber format: RS-274X (Protel extensions), 4.6 precision, mm.
- Drill format: Excellon, absolute coords, mm, decimal zeros, separate PTH/NPTH.
- DRC: passes with 0 errors. Only "library hygiene" warnings remain
  (inline footprint copies of U2 and the 4 mounting holes differ from
  their source libraries — no manufacturing impact).
