ProAmpac's line of vault bundle federal compliant security bags are designed with tamper-evident technology for high-risk applications. Our security bags feature an easy-to-use closure that provides a high degree of security against mechanical, freeze, heat, solvent and moisture methods of attack. Once closed, unauthorized attempt to open the bag will cause the closure to void. Features include -Available in clear or opaque film. External pocket available. Up to 20 bundles of cash. Easy-to-write-on surface, Sequential numbering and barcodes. Tear-off receipts with matching bag number. Custom solutions available upon request