Single Tube Ballpoint Variations

From IAP-Wiki
Jump to navigation Jump to search

This page is an attempt to make sense of the variations on the Single Tube Ballpoint pen referred to as the "Sierra" style.  Some have different tube lengths, some of the tubes are different in diameter, and the fittings may be slightly larger or smaller than the standard Sierra.

Please improve this page by adding content.  You can discuss changes needed with others on the discussion page (tab at top of screen), or in the Wiki Development forum.