This is the Rite in the Rain No. 15BR lead refill 24-pack (two 12-packs) of medium HB 1.3mm leads, each 2.5 inches long. The leads fit all Rite in the Rain 15-series and 13-series mechanical pencils.
It keeps the all-weather pencil system fed for a year of field days — fine enough to record details, thick enough not to snap when the clipboard becomes a workbench. Stash one tube in the truck and one in the kit.
Rite in the Rain has made all-weather writing paper in Tacoma, Washington since 1916, when it was developed for logging crews in the Pacific Northwest.
