This Gen 1 lock and load cartridge was made for certain StarTrac Impact strength models from April 2007 to April 2008.
Due to different versions of the lock and load cartridge, a Gen 1 cartridge can only be replaced by a Gen 1 cartridge.

This Gen 1 LNL was used on all STS Impact strength made 2007 to April 2008. STS Impact models include 9PR, 9MS, and 9LL model prefixes.