Accustamp2 Shutter Stamp with Microban, Red, AIR MAIL, 1 5/8 x 1/2, Sold as 1 Each Microban? protected pre-inked stamp with dust cover that automatically opens and closes. Unique dust cover automatically opens and closes while stamping. Microban? antimicrobial protection works continuously to inhibit the growth of stain- and odor-causing bacteria. Ergonomic rubber grip. Up to 50,000 impressions.