411 REFERENCE · Wiktionary
5H
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
- s
en British English A grade of pencil with lead that makes lighter marks than a pencil grade 4H but darker marks than a pencil of grade 6H; a pencil with very hard lead.
A pencil of the grade 5H.