Brady PermaSleeve part number LSZH-375-2-WT. DigiKey part number 2267-LSZH-375-2-WT-ND
This one would be 1000 pieces or labels per order of 1 box.
Brady Web site link: Brady Part: LSZH-375-2-WT | 141242 | PermaSleeve Low Smoke Zero Halogen Heat Shrink Labels, 3/8" Dia, for 3" Core Printers - 0.5", White | BradyID.com
Screen shot from the Brady Web site
