The Towa APN-30 Label Applicator is the industry leading hand-held label applicator. With a unique patented sensor that detects the edge of each label, it applies your labels with great precision to virtually any surface. Just squeeze the trigger and apply. The APN-30 works with label stock that measures between 0.75 inches to 1.2 inches (20mm to 30mm) and an outside diameter of 4 inches (10cm).