WPI-g-00053775–120 g/m²Virgin kraft53% confidence
Auto mailer envelopes.
Stationery paper grade. Permanent ID WPI-g-000537 — verified, source-traced, free.
GSM 60
60g/m²
lighter
GSM 75 · this
75g/m²
WPI-g-000537 · standard
GSM 105
105g/m²
heavier
01
Canonical specification
Basis weight
75–120g/m²
Fiber source
Virgin kraft
stationery
Paper type
stationery
Confidence
53%
source: wpi
WPI ID
WPI-g-000537
Slug
auto-mailer-envelopes
Last updated
2026-04-18
GSM range
75–120g/m²
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