Shape: Circle,(Circular) Perforations: Yes, between each label. Roll Diameter: 5" Outside Diameter Core Size: 3" Inside Diameter Paper Core. Liner Paper: 1.625" Wide Silicone Liner Paper Label Gap: 1/8" Gap (space) Between Labels Adhesive Type: Permanent Self Adhesive Hand Applied: Yes, can be hand applied. Machine Applied: No, can not be machine applied. Ribbon Needed?: Yes. Related Terms: Thermal Printer Labels, Color Coding, DayGlo, Neon