This is a TOSHIBA TEC label product with part number LTX010010R1ST-BLU. It is a thermal transfer, non-perforated label designed for use with TOSHIBA printers.
These labels are 1-inch in diameter, have a blue color, and come wound out on a 3-inch inner diameter core with a 4-inch outer diameter.
They are supplied in rolls of 500 labels, with 4 rolls per case.
LTX010010R1ST-BLU - Toshiba TEC, CONSUMABLES, LABEL, TT, NON-PERF, 1" CIRCLE, BLUE, 500/ROLL, 4/CASE, 3" ID - 4" OD, WOU