THIS LISTING: Stock Square Security Valid Authentic Genuine Hologram Security Label on 2 mil metalized silver polyester. 100 Label Tamper Evident labels. Each label measures 12 mm Square. NO CUSTOM PRINTING AVAILABLE ON THIS LISTING. If you need custom printing, please view our other listings or contact us for help. The hologram is activated with light and movement. Just press and leave several minutes prior to testing release. The label will leave some or all of the metalized silver backing on your product as shown in the picture. Our labels are manufactured in the United States using only quality materials. They are very easy to apply, simply peel and stick to most any clean surface. Once cured, they cannot be removed without evidence of tampering. The holograms come on a silicone coated paper liner. If your product contains silicone or has a silicone coating, they will not work for you.