Wasp 2.25" x .75" Direct Thermal Labels, 4 rolls, 2300 per roll, 5" ODWasp 2. 25" x. 75" Direct Thermal Labels 4 Rolls, 2300 per Roll, 5" OD Experience cost efficient, ribbon free labeling with the Wasp 2. 25" x. 75" Direct Thermal Labels. This four roll pack delivers 2300 labels per roll, totaling 9,200 labels, wrapped around 5" outer diameter rolls designed to minimize changeovers and maximize productivity. Direct thermal printing uses heat sensitive stock to apply images, text, and barcodes directly onto the label