Phil is referring to a type of brass strip some times used for making sliders ( also known as shanks ) which are a fixing medium for cap badges in general.
Some times the sliders ( shanks ) are cut and bent from a strip of extruded brass strip and a lot of people, myself included call them extruded sliders, the other usual method for making sliders ( shanks ) is to stamp them out of brass sheet.
You are not splitting hairs Phil, I believe the correct terminology might be splitting infinitives but at the end of the day we all say what we are comfortable with and saying " extruded sliders " is a lot easier than " sliders cut and bent from a length extruded brass strip ", know what I mean lol ???
I think to 99.9% of people they are just sliders ?? to expand the discussion, is it lugs or loops ???
Dave.