Kaweco Leads for Sketch Up

All product photography and description is provided by the lovely folks at The Good Liver. This is a real product you can purchase at https://good-liver.com/

These are graphite refills for Kaweco Sketch Up Pencils. 

Since 1883, Kaweco has been making geometric fountain pens mechanical pencils, rollerballs, and ballpoint pens in Nuremburg, Germany.