4″ x 6-1/2″ Direct Thermal Labels, 900 Per Roll, on 3" Core - 4 Rolls. SKU: 5105134 x 6 12 Direct Thermal Labels Label Size: 4" x 6 1 2" Carrier Width: 4 1 8" Outside Diameter: 8" Core Size: 3" Color: White Format: Roll Labels Per Roll: 900 Rolls Per Case: 4 Total Labels Per Case: 3600 Gap Measurement: 1 8" Perforation: Yes Weight: 23. 6 lbs Timing Mark: None Topcoated: No Wound: Out Adhesive: Permanent