This is a Pengad premium ribbon for any manual machine, including the Stenograph Reporter model. They would also work on any standard spool ribbon machine including Smartwriters and Xscribe writers. 

Pengad's long-wearing Premium grade steno ribbon outlasts the standard ribbon by 3 to 1. Made from long wearing, durable nylon for durability.

Students! We recommend changing your ribbon and ink on a regular basis as part of your machine maintenance.