WPI-g-00038720–300 g/m²Virgin kraft, Recycled fibers49% confidence
Air Filters.
Industrial packaging paper grade. Permanent ID WPI-g-000387 — verified, source-traced, free.
GSM 5
5g/m²
lighter
GSM 20 · this
20g/m²
WPI-g-000387 · standard
GSM 50
50g/m²
heavier
01
Canonical specification
Basis weight
20–300g/m²
Fiber source
Virgin kraft, Recycled fibers
industrial packaging
Paper type
industrial packaging
Confidence
49%
source: wpi
WPI ID
WPI-g-000387
Slug
air-filters
Last updated
2026-04-18
GSM range
20–300g/m²
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