What are the media specifications for paper and envelopes?
The HP LaserJet 3050/3052/3055 supports standard weight paper up to legal size, while the 3390/3392 support heavier weights such as card stock. Envelopes should be C6, A6, or DL sizes for optimal handling. Detailed guidelines are provided in the manual starting on page 38.
From the official HP Laserjet 3050 All IN One Printer manual, page 3
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