This is a TOSHIBA TEC consumable product, specifically a DT (Direct Thermal) label. It is white, features perforations for easy separation, and comes in a size of 3" x 1". Each roll contains 5,500 labels.
The labels are top-coated for durability and wound out. They have a removable adhesive and are designed for applications requiring a 3" inner diameter and an 8" outer diameter core.