It said for D1. I just bought a Dymo D1 model 160.
Back of package said: Compatible with DYMO® LabelPoint 200, 300, LabelManager 100, 110, 200, 300, PC and Pocket 1000, 1000 Plus, 2000, 3500, 4500, 5000 and 5500 models
It must have been real old. It didn't fit so I threw it away.